Middle English moste, from Old English mōste, past indicative & subjunctive of mōtan to be allowed to, have to; akin to Old High German muozan to be allowed to, have to
Noun (2)
Middle English, from Old English, from Latin mustum
Noun (3)
Middle English (Scots) moist, from Middle French must, alteration of musc musk
First Known Use
Verb
before the 12th century, in the meaning defined at sense 1a