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BNC: 8527 COCA: 8231

irrational

1 ENTRIES FOUND:
irrational ˈræʃənəl/ adjective
irrational
ˈræʃənəl/
adjective
Learner's definition of IRRATIONAL
[more irrational; most irrational]
: not rational无理性的: such as
: not thinking clearly : not able to use reason or good judgment失去理智的
: not based on reason, good judgment, or clear thinking不合理的;荒谬的

— irrationality

/ɪˌræʃəˈnæləti/ noun [noncount]

— irrationally

ˈræʃənəli/ adverb
BNC: 8527 COCA: 8231

irrational

1 of 2

adjective

ir·​ra·​tio·​nal i-ˈra-sh(ə-)nəl How to pronounce irrational (audio)
ˌi(r)-
: not rational: such as
a(1)
: lacking usual or normal mental clarity or coherence
(2)
: not endowed with reason or understanding
b
: not governed by or according to reason
irrational fears
c Greek and Latin prosody
(1)
of a syllable : having a quantity other than that required by the meter
(2)
of a foot : containing such a syllable
d(1)
: being an irrational number
an irrational root of an equation
(2)
: having a numerical value that is an irrational number
a length that is irrational
irrationality noun
irrationally adverb

irrational

2 of 2

noun

1
: an irrational being
2

Example Sentences

Adjective He became irrational as the fever got worse. She had an irrational fear of cats.
Recent Examples on the Web
Adjective
The market is irrational and the combination of decent demand, falling inventories and tight supply should be pushing prices up, Goldman Sachs analysts said in an Aug. 12 report. Anna Hirtenstein, WSJ, 24 Aug. 2022 It’s not irrational to find deals including pizza for $3.14 this Monday. Kelly Tyko, USA TODAY, 14 Mar. 2022 What’s irrational is to pretend that such risks do not exist. James Freeman, WSJ, 9 Mar. 2022 It’s not irrational to find pizza pies for $3.14 this Sunday. Kelly Tyko, The Arizona Republic, 14 Mar. 2021 Talk back to the worries that are irrational, reminding yourself of past transitions that worked out well. Rachel Feintzeig, WSJ, 22 Aug. 2022 On the other hand, unfounded optimism can also lead to irrational investment decisions. Q.ai - Make Genius Money Moves, Forbes, 18 Oct. 2021 Scientists frequently accuse those who reject their findings of being irrational. Naomi Oreskes, Scientific American, 20 July 2022 Because scapegoating is irrational, offenders often will target someone who happens to be nearby. Katherine Kam, Washington Post, 19 July 2022
Noun
But riveted mankind is hopelessly addicted to the irrational, with reliably disastrous results, planetwide. Alison Fishburn, Longreads, 17 Sep. 2022 On the back of the acquisitions of AirTerra and Quiet Logistics in 2021, AEO seemed to do the irrational by bringing onstream capacities and capabilities that significantly exceeded its own item demand. Niall Murphy, Forbes, 17 June 2022 The moral, social, and epistemic void in which Germans found themselves after defeat was filled, at least for a time, by the irrational. Richard J. Evans, The New Republic, 1 Dec. 2021 As such, any attempt to explain it will run sooner or later into the wall of the irrational. Phil Klay, Harper's Magazine, 23 Nov. 2021 But feeling anxious right now is not at all out of line or irrational. Jessica Dulong, CNN, 31 Aug. 2021 Attempting to appease the loudest to the detriment of the community only emboldens the irrational and silences those looking to have productive conversation. Benjamin Ayanian, Star Tribune, 5 May 2021 To believe in the return of a long-dead child reflects the anguish of the believer and, of course, a tendency to embrace the irrational. Dorothy Rabinowitz, WSJ, 29 Apr. 2021 We are all steered by a mixture of the rational and the irrational. Christopher Beha, Harpers Magazine, 5 Jan. 2021 See More

Word History

Etymology

Adjective

Middle English, from Latin irrationalis, from in- + rationalis rational

First Known Use

Adjective

14th century, in the meaning defined above

Noun

1646, in the meaning defined at sense 1

Time Traveler
The first known use of irrational was in the 14th century
BNC: 8527 COCA: 8231
irrational

adjective

VERBS | ADVERB VERBSappear, be, seem顯得不理性;不合理;似乎失去理性become變得不理性consider sth, regard sth as, see sth as認為⋯不合理dismiss sth as認為⋯不合理而不加考慮He dismissed her fears as irrational.他認為她的恐懼毫無道理而未加理睬。ADVERBcompletely, quite, totally, wholly完全不合理;十分不合理;毫無道理increasingly越來越不合理somewhat有些不理性apparently, seemingly表面上/貌似不合理inherently根本不合理There was nothing inherently irrational in such a decision.從根本上看,這樣的決定沒什麼不合理的地方。

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