IPA: /ˈveɪnər/
KK: /ˈveɪnər/
More concerned about one's appearance or achievements than is necessary or reasonable.
She became vainer after winning the award and often talked about her looks.
Comparative: vainer
Superlative: vainest
Vainer is derived from "vain" (from Old French *vain*, meaning empty or worthless) and the suffix "-er" (meaning a person who). The word "vainer" refers to a person who is excessively proud of their appearance or achievements, often to the point of being empty or superficial.
Think of someone who is 'empty' ('vain') and the '-er' indicating a person. This helps you remember that a vainer person is someone who is excessively proud of themselves.