IPA: /ˈnɒn.eɪdʒ/
KK: /ˈnɒnɪdʒ/
A time in a person's life when they are not yet an adult and are considered legally underage.
During his nonage, he learned many important lessons that shaped his future.
Nonage → It is formed from "non-" (meaning not) and "aetas" (from Latin, meaning age). The word refers to the period of life when a person is not yet of age or legal adulthood.
Think of 'not' ('non-') being combined with 'age' — this helps you remember that 'nonage' refers to the time before reaching adulthood.