The story
- Proto-Germanic · inherited from*unlustuz“listlessness”
- Proto-West Germanic · inherited from*unlust
- Old English · inherited fromunlust“displeasure, dislike”
- Middle English · inherited fromunlust
- English todayunlust
From Middle English unlust, from Old English unlust (“displeasure, dislike”), from Proto-West Germanic *unlust, from Proto-Germanic *unlustuz (“listlessness”). Equivalent to un- + lust.
Etymology from Wiktionary, CC BY-SA 4.0.