verb (vanish, es)
- To become invisible or move out of view unnoticed.
- (Mathematics) To become equal to zero.
Etymology: Aphetic for obsolete evanish, Old French esvanir, esvaniss- (French évanouir), Vulgar Latin evanescere, from vanus, "empty".
- The function f(x)=x^2 vanishes at x=0.
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