vanish

To pass out of sight, especially quickly; disappear. synonym: disappear.

To pass out of existence.

To become zero. Used of a function or variable.

To disappear quickly; pass from a visible to an invisible state; become imperceptible.

To pass out of view; pass beyond the limit of vision; disappear gradually; fade away.

To pass away; be annihilated or lost; be no more.

To rise or be given off, as breath; exhale.

In mathematics, to become zero.

In phonetics, a sound with which another principal sound vanishes or ends, as the ē-sound of ā (the i in ei as pronounced in veil), or the ö-sound of ō (the u in ou as pronounced in soul).