IPA: /ˈbaʊnsi/
KK: /ˈbaʊnsi/
Having a lively and energetic quality; able to spring back or bounce easily.
The children jumped on the bouncy castle with excitement.
Comparative: bouncier
Superlative: bounciest
Bouncy → It is formed from "bounce" (of uncertain origin, possibly imitative of the sound) and the suffix "-y" (meaning characterized by). The word "bouncy" describes something characterized by the ability to bounce or spring back.
Think of something that is characterized by the ability to 'bounce' — that's what 'bouncy' means.