Words related to non-
also nonconsensual, "done without consent," by 1945 in legalese, from non- + consensual (q.v.). Used since 1960s by sociologists and in political science; used by 1977 in legal discussions and definitions of rape and other sex crimes and popularized in this sense from c. 1995. An earlier adjective was non-consenting (1670s), which was used of persons, not acts.
also non-descript, 1680s, in scientific usage, "not hitherto described" (a sense now obsolete), coined from non- "not" + Latin descriptus, past participle of describere "to write down, copy; sketch, represent" (see describe). General sense of "not easily described or classified," hence "of no particular kind," is from 1806.
Middle English non, none, from Old English nan "not one, not any, no person; not the least part," from ne "not" (see no) + an "one" (see one). Cognate with Old Saxon, Middle Low German nen, Old Norse neinn, Middle Dutch, Dutch neen, Old High German, German nein "no," and analogous to Latin non- (see non-). It is thus the negative of one, an, and a (1).
As an adverb, "1650s, "by no means;" 1799 as "in no respect or degree, to no extent." As an adjective from late Old English; since c. 1600 reduced to no except in a few archaic phrases, especially before vowels, such as none other, none the worse.