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- scantier 1
- sevener 8
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- luminosity 62
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- tea shop 9
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- trousers 294
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- width 354
- elbow 326
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- native 329
- painterly 11
- quote 494
- pricker 6
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- Prototypical 86
- remainders 2
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- rime 14
- diagrammatic 32
- pipit 6
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- heraldry 12
- curate 55
- TD 3
- giant 302
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- parodic 5
- confirmation 64
- screwier 5
- rigor 98
- foresaw 19
- intern 370
- hearty 61
- refuel 8
- expedition 120
- galloping 55
- formulate 114
- correspond 321
- fracking 36
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- stork 90
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- scrofula 2
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- brackish 69
- yet 98
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- Version 171
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- loving 145
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- usurpation 5
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- circumscription 36
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- close 259
- canonic 9
- aspectual 19
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- futures 22
- age group 41
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- Payment 31
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- syncopative 1
- BROADLY 27
- herbarium 5
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- seychellois 7
- bitterly 232
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- talc 6
- stammer 54
- Novelty 12
- Plain 107
- swansea 4
- stockbroker 11
- shoestrings 1
- florae 4
- aquatic 61
- Addictive 51
- ibs 11
- thermo- 2
- superglue 1
- Excuses 18
- Valley 30
- teenybopper 12
- good 360
- seaplane 10
- speed 425
- her 74
- viperine 2
- ravish 1
- peachy 46
- reeded 8
- restive 7
- helping 23
- slovenian 1
- reliquary 10
- expressionless 55
- toss 332
- Pizza 118
- defendant 152
- spicier 2
- feasibility 401
- serve 201
- gradually 246
- flambé 12
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- dominatrix 37
- proto- 4
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- areolae 4
- Patient 129
- rounder 4
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- prideless 5
- handed 6
- andrews 7
- sashless 3
- modernise 6
- Architecture 145
- sooty 1
- silverback 7
- seriousness 30
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- Dweller 24
- curetting 9
- erven 5
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- skyey 2
- revel 38
- septuagenarian 1
- ayatollah 33
- narrowly 74
- Material 131
- ryan 4
- scriptoria 4
- stores 3
- swing shift 34
- outstrip 28
- insolvency 7
- failure 341
- astonishment 69
- uninformed 2
- Hope 118
- snippety 7
- promotability 1
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- podding 1
- unarguable 1
- unexclusive 9
- replace 327
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- pinafore 3
- squall 51
- scotties 2
- vigil 183
- attending 52
- roughcast 1
- contagion 46
- grocer 265
- CONTENT 41
- Pulp 27
- properly 318
- carpenter 302
- iranian 10
- plaster 362
- bleeper 46
- proscription 1
- collected 116
- inner 345
- fluky 38
- skinning 1
- nominal 41
- Essence 44
- circumference 324
- eyelid 65
- underpants 2
- uncomplainingly 4
- sofar 34
- exhaust 341
- banner head 28
- tracks 4
- obfuscation 34
- job 258
- shreddy 4
- broccoli 52
- pinnies 4
- rpg 5
- chicanery 117
- exteriority 38
- acclimate 57
- infill 8
- tera- 5
- Pitiful 44
- irresistible 71
- Pledge 165
- physicist 347
- subscript 5
- salamandrian 2
- patent 163
- acknowledgment 135
- variable 343
- Triage 48
- remembrances 4
- eligible 115
- Lock 78
- dog 132
- diagraph 15
- blurb 121
- Eloquent 139
- vitalness 4
- waviest 1
- eardrum 56
- anatomic 24
- prostitute 3
- Map out 24
- phonetic 13
- sprite 4
- seconds 5
- pretense 107
- ditch 340
- portioner 5
- spitfire 4
- airs 21
- buzzard 80
- lust 99
- ringleader 2
- scurvy 8
- pursership 2
- sorghum 2
- swept-back 8
- byline 90
- Impolite 56
- uaw 3
- cellar 317
- pitiless 2
- forbearant 6
- sailboating 1
- Infirm 25
- comb 319
- jag 5
- veracity 8
- moan 369
- wealthier 2
- organization 403
- tabloid 3
- poppa 9
- faint 383
- semibreve 9
- unquoted 3
- thinnest 1
- Brave New World 29
- uhf 6
- Impulsive 100
- veritable 2
- accomplice 139
- sacra 3
- Rio 20
- throat 332
- take it easy 17
- institutionalized 9
- ralph 4
- hereto 9
- balaclava 48
- playback 2
- appurtenance 54
- prophetical 3
- superbug 3
- mediation 159
- carpet-bomb 38
- cma 7
- Backfire 24
- Abuse 161
- duckling 52
- snickerer 3
- starve 365
- untrodden 3
- toothless 3
- Protestant 5
- Consumer 157
- rubidium 2
- head-on 130
- undercapitalize 3
- sleety 3
- stript 3
- Duo 26
- particularized 6
- seismograph 3
- plasterer 7
- subitem 2
- maybe 55
- fiberboard 65
- cadenza 40
- straight 130
- more than 33
- doctorly 27
- parenthetical 8
- unequals 4
- indignant 348
- Sprout 79
- courtyard 70
- tufty 3
- scarey 2
- conglomeration 53
- mislay 7
- selfsameness 5
- mostly 330
- weldability 1
- spunkiness 3
- quadriplegic 3
- tornado 12
- acquaintance 359
- cannot 86
- undertow 9
- paganism 8
- logistic 100
- chitter 34
- variative 6
- steading 3
- valentine 4
- plumbing 1
- inward 385
- overregulate 9
- mickey 7
- rook 4
- sostenuto 7
- yesterday 10
- updo 2
- unsaturated 7
- tonalities 1
- comestible 9
- dormered 29
- hardcover 9
- bahadur 9
- sans 9
- smell 172
- stencilled 4
- polarizability 2
- penknife 16
- pincushion 2
- Ground glass 9
- redolence 1
- in particular 49
- theatricals 2
- pathogenic 63
- nawab 12
- paraquat 6
- tempeh 4
- inaccuracy 149
- grow 138
- Obligation 197
- tds 2
- noticeable 321
- Litigation 135
- theatricalize 5
- It 153
- spotlit 1
- invade 308
- renminbi 12
- Councillor 136
- bough 283
- uninstall 3
- Aboriginal 73
- Preferring 20
- midpoint 13
- softbound 4
- rearguard 5
- fructose 40
- sid 5
- Confrontation 35
- twitterer 5
- wakeboarder 1
- trial 396
- camerawork 35
- accommodation 319
- Cashier 15
- seahorse 4
- spooked 30
- nationality 339
- spirited 41
- foehn 4
- Suspense 66
- solenoidal 2
- Brood 46
- pressurize 112
- air conditioned 43
- presell 1
- free market 47
- prosodically 3
- coming-of-age 33
- enervate 49
- workmanlike 6
- raid 354
- porphyry 4
- aeronautics 59
- Cusp 49
- sailoring 2
- Stereo 102
- Agreement 172
- stitchery 1
- dildo 42
- dialog 235
- bewitch 53
- Thoroughly 107
- sideshow 9
- unnaturalize 2
- amoeba 79
- repairability 3
- bandwagon 279
- posturing 1
- studbook 3
- tented 7
- Pancreas 46
- successor 3
- unacceptably 4
- aniseed 49
- crew neck 42
- reserve 375
- Tilt 28
- premeditation 2
- surviving 4
- rewed 3
- ventriloquist 7
- malfunction 124
- profiling 3
- Weak 87
- Orgy 38
- outhouse 134
- enamel 75
- aladdin 8
- overlie 55
- dare 364
- collectivism 114
- premiership 4
- reorientation 4
- dissolution 52
- counterintuitive 52
- kechua 11
- Workable 105
- scrambler 2
- generate 388
- ufo 5
- 4x4 34
- chirp 136
- shandies 5
- high 240
- visional 4
- Omnipresent 174
- fee 353
Example Sentences
In the planner's view, Rumsfeld had two goals: to demonstrate the efficacy of precision bombing and to "do the war on the cheap." 
Seymour M. Hersh, New Yorker, 7 Apr. 2003 Vaccines exist, but their efficacy against aerosolized plague is unknown. Sharon Begley et al., Newsweek, 8 Oct. 2001 … efficacy does not have to be demonstrated before homeopathic products are marketed. Alison Abbott et al., Nature, 26 Sept. 1996 questioned the efficacy of the alarms in actually preventing auto theft
Seymour M. Hersh, New Yorker, 7 Apr. 2003 Vaccines exist, but their efficacy against aerosolized plague is unknown. Sharon Begley et al., Newsweek, 8 Oct. 2001 … efficacy does not have to be demonstrated before homeopathic products are marketed. Alison Abbott et al., Nature, 26 Sept. 1996 questioned the efficacy of the alarms in actually preventing auto theft Recent Examples on the Web Keesee said measuring training efficacy is challenging amid divergent community-to-community needs and scant quantifiable targets. Jori Epstein, USA TODAY, 7 Sep. 2022 While vaccine protection decreases over time, boosters re-stimulate the immune system and increase vaccine efficacy again. Martin Finucane, BostonGlobe.com, 7 Sep. 2022 Studies have pointed to such training's efficacy, but some critics argue that the benefits might just come from a placebo effect. Madeline Holcombe, CNN, 5 Sep. 2022 Precise mapping of urban trees can be useful not only for shade mapping but also for understanding the efficacy in tree planting for climatic purposes, according to a report published in 2021 by C40′s Cool Cities Network. Peter Yeung, oregonlive, 4 Sep. 2022 Generally, medical practitioners advise that two or more of these methods should be used in conjunction with one another to increase efficacy. Chloe Taylor, Fortune, 3 Sep. 2022 Testers also evaluate the products at home on factors such as ease of use, flavor, tooth sensitivity, cleaning efficacy (if applicable) and perceived whitening effects. April Franzino, Good Housekeeping, 30 Aug. 2022 That being said, on visual culture, on the recapturing of the conscience of one’s political power and ethical efficacy is becoming a critical and necessary battle. Vogue, 29 Aug. 2022 The handheld tool works just as the name suggests, stamping the skin with ultra-fine pin-pricks designed to increase your topical treatments' efficacy and boost collagen (just like a traditional dermaroller). ELLE, 29 Aug. 2022 See More
Jori Epstein, USA TODAY, 7 Sep. 2022 While vaccine protection decreases over time, boosters re-stimulate the immune system and increase vaccine efficacy again. Martin Finucane, BostonGlobe.com, 7 Sep. 2022 Studies have pointed to such training's efficacy, but some critics argue that the benefits might just come from a placebo effect. Madeline Holcombe, CNN, 5 Sep. 2022 Precise mapping of urban trees can be useful not only for shade mapping but also for understanding the efficacy in tree planting for climatic purposes, according to a report published in 2021 by C40′s Cool Cities Network. Peter Yeung, oregonlive, 4 Sep. 2022 Generally, medical practitioners advise that two or more of these methods should be used in conjunction with one another to increase efficacy. Chloe Taylor, Fortune, 3 Sep. 2022 Testers also evaluate the products at home on factors such as ease of use, flavor, tooth sensitivity, cleaning efficacy (if applicable) and perceived whitening effects. April Franzino, Good Housekeeping, 30 Aug. 2022 That being said, on visual culture, on the recapturing of the conscience of one’s political power and ethical efficacy is becoming a critical and necessary battle. Vogue, 29 Aug. 2022 The handheld tool works just as the name suggests, stamping the skin with ultra-fine pin-pricks designed to increase your topical treatments' efficacy and boost collagen (just like a traditional dermaroller). ELLE, 29 Aug. 2022 See More Word History
Etymology
borrowed from Latin efficācia, from efficāc-, efficāx "capable of fulfilling a function, efficacious" + -ia -y entry 2
First Known Use
13th century, in the meaning defined above
Time Traveler
The first known use of efficacy was in the 13th century 👨🏻🏫 Mr. Ng 韋氏詞典 📚 – mw.mister5️⃣.net
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