Unavoidable a. : Not avoidable; incapable of being shunned or prevented; inevitable; necessary; as, unavoidable troubles.

Unavoidable a. : Not voidable; incapable of being made null or void.

Example:
It is Unavoidable that a kid will grow older, however it is not Unavoidable to grow up poorly or wisely.?

Taxonomy
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Defination from the web:
unavoidable from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "unavoidable" and related topics at Britannica.com. See a map of "unavoidable" in the Visual Thesaurus. Pronunciation ...