IPA: //ˈpɜr.ki//
KK: /ˈpɜrki/
The most lively and cheerful; full of energy and enthusiasm.
She was the perkiest person at the party, always smiling and dancing.
Comparative: perkier
Superlative: perkiest
Perkiest → It is formed from "perky" (of uncertain origin, possibly from the dialectal word 'perky' meaning lively or cheerful) and the suffix "-est" (meaning the most). The word "perkiest" means the most lively or cheerful.
Think of someone being the 'most lively' or 'cheerful' — that's what 'perkiest' means.