IPA: /ˈɡɪɡliəst/
KK: /ˈgɪɡlɪst/
The most likely to laugh or giggle; extremely cheerful and playful.
She was the giggliest person at the party, making everyone laugh with her jokes.
Comparative: giggler
Superlative: giggliest
Giggliest → It is formed from "giggle" (of uncertain origin, possibly imitative of the sound) and the suffix "-iest" (meaning most). The word "giggliest" describes someone who is the most prone to giggling or laughing in a light-hearted manner.
Think of the sound of laughter that comes from "giggle" and remember that "giggliest" means the person who laughs the most.