,aff. an ending of the third person singular present indicative of verbs, now occurring only in archaic forms or used in solemn or poetic language:hopeth; sitteth[/ex]•Etymology: OE -eth, -ath, -oth, -th; akin to L -t II-ethaff.var. of -th II the ordinal suffix, used when the cardinal number ends in -y:twentieth; thirtieth[/ex]
From formal English to slang. 2014.