vain

adjective

Excessively proud of one's appearance, abilities, or achievements; conceited.

"She was very vain about her new haircut."

adjective

Producing no result; useless or futile. Often used in the phrase 'in vain'.

"All their efforts to find him were in vain."

Thesaurus

Synonyms: futile, bootless, unproductive, fruitless, sleeveless, swollen-headed, conceited, egotistic, self-conceited, proud, egotistical, swollen