зазнава́ться

very rarely used word (top 40,000)

have a fair opinion of oneself, give oneself airs, think no small beer of oneself

Examples

Не зазнава́йтесь.Don't flatter yourself.

Не слишком зазнава́йся.Don't get too cocky.

Не зазнава́йся.Don't give yourself airs.

Дава́йте не будем зазнава́ться.Let's not get cocky.

Не зазнава́йся, Том.Get off your high horse, Tom.

Imperative
ты	зазнава́йся
вы	зазнава́йтесь

Active present	зазнаю́щийся	arrogant, conceited, stuck-up, vainglorious
Active past	зазнава́вшийся	conceited, arrogant, haughty, stuck-up
Passive present	-
Passive past	-
Gerund present	зазнава́ясь	while doing (present)
Gerund past	зазнававшись	while doing (past)