Webster's Revised Unabridged Dictionary · 1913

Sty

Sty (stī) , noun

[Anglo-Saxon stigu, from stīgan to rise; originally, probably, a place into which animals climbed or went up. r164. See Sty, v. i., and compare Steward.]

1.
A pen or inclosure for swine.
2.
A place of bestial debauchery.
To roll with pleasure in a sensual sty. — Milton

Sty (stīd) , transitive verb

To shut up in, or as in, a sty. — Shakespeare

Sty , intransitive verb

[Old English stien, stiyen, Anglo-Saxon stīgan to rise; akin to Dutch stijgen, Old Saxon & Old High German stīgan, German steigen, Icelandic stīga, Swedish stiga, Danish stige, Gothic steigan, Latin vestigium footstep, Greek {not transcribed} to walk, to go, Sanskrit stigh to mount. Compare Distich, Stair steps, Stirrup, Sty a boil, a pen for swine, Vestige.]

To soar; to ascend; to mount. See Stirrup. [Obsolete]
With bolder wing shall dare aloft to sty, To the last praises of this Faery Queene. — Spenser

Sty , noun

[For older styan, styanye, understood as sty on eye, Anglo-Saxon stīgend (sc. eáge eye), properly, rising, or swelling (eye), past participle of stīgan to rise. See Sty, v. i.]

(Medicine) An inflamed swelling or boil on the edge of the eyelid.