IPA: /nɒn.nəˈsɛs.ɪ.ti/
KK: /nɑnˈnɛsɪti/
Something that is not needed or essential.
Many people consider luxury items to be a nonnecessity in their lives.
Nonnecessity → It is formed from "non-" (meaning not) and "necessitas" (from Latin, meaning necessity). The word refers to something that is not necessary or essential.
Think of 'not' ('non-') and 'necessity' — this helps you remember that 'nonnecessity' means something that is not necessary.