Tiringly long, slow, or dull; lacking in variety or excitement. Causing boredom through repetition or excessive length.
From Latin taediosus, from taedium meaning 'weariness, disgust,' related to taedere 'to weary.' Entered English in the 15th century, maintaining its sense of mental exhaustion from monotony.
Tedious captures that particular kind of mental fatigue that comes not from difficulty but from mind-numbing repetition - it's the difference between being challenged and being bored to death. The word itself almost feels long and drawn out when you say it, as if the pronunciation mirrors the experience it describes.
Complete word intelligence in one call. Free tier — 50 lookups/day.