Obsolesce v. i. : To become obsolescent.

Example:
I need two references: one for "to necessitate" and one for "to Obsolesce".?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, Google Search, Custom Search, glossary, english, language, ESL, Search, lesce, äb, Inflected, lesc, Etymology.

Defination from the web:
obsolesce from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "obsolesce" and related topics at Britannica.com. Pronunciation Symbols. Share this entry: Link to this page: Cite this page: Products ...