An Etymological Dictionary of the German Language/in

by Friedrich Kluge

in, prep., ‘in, into, at,’ from the equiv. MidHG. and OHG. in, a common Teut. prep. with the same form; comp. Goth., AS., E., Du., and OSax. in, ‘in.’ Its primit. kinship with Lat. in, Gr. ἐν, ἐνί, Lith. i, and Lett. ë is certain. To this are allied indem, indeß, and indessen.