sty

From Middle English sty, from Old English stī, stiġ (“sty, pen, a wooden enclosure; hall”, chiefly in compounds). Cognate with German Stiege (“wooden crate”), dialectal German Steige (“hen-coop”), Danish sti (“sty, enclosure for swine, sheep, hens, etc.”), Swedish stia (“sty for pigs, geese, etc.”), Norwegian sti (“flock of sheep”), Icelandic stía (“a kennel”).

From Middle English stien, stiȝen, stighen, from Old English stīgan (“to go; ascend, mount”), from Proto-West Germanic stīgan, from Proto-Germanic stīganą, from Proto-Indo-European *steygʰ-. Cognate with Dutch stijgen, German steigen, Danish stige, Norwegian Bokmål stige, Norwegian Nynorsk and Swedish stiga, Old Norse stíga.

From Middle English styanye, mistaken as "sty on eye" yet composed of Old English stīġend (“sty”, literally “riser”), agent noun from stīgan (“to rise”) + Middle English yë (“eye”).