IPA: /ˈwɪmzɪkəl.nəs/
KK: /ˈwɪmzɪkəlnəs/
The quality of being playful, fanciful, or full of whims; a light-hearted and imaginative nature.
The whimsicalness of the garden, with its colorful flowers and quirky decorations, made it a delightful place to visit.
Whimsicalness is formed from "whimsical" (from Middle English "whimsy", meaning a fanciful or capricious idea) and "-ness" (meaning the state or quality of). The word "whimsicalness" refers to the quality of being fanciful or capricious.
Think of 'whimsical' as describing something fanciful or playful, and '-ness' indicating a state. So, whimsicalness is the state of being playful or fanciful.