- lax (adj.)
- c.1400, "loose" (in ref. to bowels), from L. laxus "wide, loose, open," from PIE base *sleg- "to be slack, be languid" (cf. Gk. legein "to leave off, stop," lagos "hare," lit. "with drooping ears," lagnos "lustful, lascivious," lagaros "slack, hollow, shrunken;" L. languere "to be faint, weary," languidis "faint, weak, dull, sluggish, languid"). Of rules, discipline, etc., attested from mid-15c. Related: Laxity.