IPA: //ˈveɪnɪst//
KK: /venɪst/
Having an excessively high opinion of one's own appearance, abilities, or worth; the most self-absorbed or conceited.
She was considered the vainest person in the room, always admiring herself in the mirror.
Comparative: more vain
Superlative: vainest
**Vainest** → It is formed from "vain" (from Old French *vain*, meaning empty or worthless) and the superlative suffix "-est" (meaning most). The word "vainest" means most empty or worthless, often referring to excessive pride or self-importance.
Think of 'vain' meaning empty or worthless, and remember that 'vainest' describes someone who is the most empty in terms of self-importance.
No commonly confused words.