Definition: the feeling of dissatisfaction or weakness as a result of lack of interest, boredom
Usage: After having already published thirteen novels, the author felt only ennui at the prospect of writing another.
Related: languor, boredom, dissatisfaction, tiredness, doldrums, lethargy, tedium, las- situde, melancholy, weariness, blahs, surfeit, yawn
Origin: French in origin, ennui conveys a specific kind of boredom that comes from repetition or lack of challenge in one's life in general or in an endeavor.