disappear

verb4

1. •
   to go out of sight, often suddenly
2. •
   To go missing; to become a missing person.

   • Eighteen years after Jaycee Dugard disappeared in 1991, she was found alive in the summer of 2009.
3. •
   To go away; to become lost.

   • A turban and loincloth soaked in blood had been found; also a staff. These properties were known to have belonged to a toddy drawer. He had disappeared. — 1927
4. •
   (euphemistic) To make vanish; especially, to abduct or murder for political reasons.

   • The Chinese government is well-known for disappearing particularly vocal political dissidents.