IPA: //kɑːrˈtuːni//
KK: /kɑrˈtunɪ/
Having a style that resembles or is characteristic of cartoons, often exaggerated and colorful.
The movie's characters were very cartoony, with big eyes and funny expressions.
Cartoony → The word is derived from 'cartoon' (from Italian 'cartone', meaning a large paper or cardboard) and the suffix '-y' (meaning characterized by). Thus, 'cartoony' describes something that is characterized by the qualities of a cartoon.
Think of 'cartoon' as a large paper drawing, and remember that 'cartoony' means something that has the characteristics of a cartoon.