IPA: /ˈpɜːrkɪnəs/
KK: /ˈpɜrkɪnɪs/
The state of being cheerful, lively, and full of energy.
Her perkiness brightened up the whole room during the party.
Perkiness → It is formed from "perky" (originating from the dialectal English word meaning lively or cheerful) and the suffix "-ness" (meaning the state or quality of). The word "perkiness" refers to the state of being lively or cheerful.
Think of someone who is lively and cheerful, which is what 'perkiness' describes — the quality of being perky.