IPA: /nɒnˈfætənɪŋ/
KK: /nɑnˈfætənɪŋ/
This word describes something that does not lead to weight gain or does not make a person fat.
Many people choose nonfattening snacks to maintain a healthy diet.
Nonfattening → It is formed from "non-" (meaning not) and "fattening" (from the root "fatten" which comes from Old English "fǣttan", meaning to make fat). The word "nonfattening" means not making one fat or not contributing to weight gain.
Think of 'not' ('non-') making you 'fat' ('fattening') — that's why nonfattening means it doesn't make you gain weight.