early 15c., from Old French tedieus, from Late Latin taediosus "wearisome, irksome, tedious," from Latin taedium (see tedium). Related: Tediously; tediousness.
Entries linking to tedious
tedium n.
"tediousness," 1660s, from Latin taedium "weariness, irksomeness, disgust" (mostly post-classical), which is related to taedet "it is wearisome, it excites loathing" (in Late Latin "be disgusted with, be weary of") and to taedere "to weary," but the whole group is of uncertain etymology. Possible cognates are Old Church Slavonic težo, Lithuanian tingiu, tingėti "to be dull, be listless."