vanish

The brief terminal part of a vowel or vocal element, differing more or less in quality from the main part.

“a as in ale ordinarily ends with a vanish of i as in ill.”

A magic trick in which something seems to disappear.

“The French drop is a well-known vanish involving sleight of hand.”

To become invisible or to move out of view unnoticed.

To become equal to zero.

“The function f(x)=x^2 vanishes at x=0.”

To disappear; to kidnap