dis-ap-pear
verb

1.to cease to be seen; vanish

2.to cease to exist; pass away; end gradually

abscond, be done for, be gone, be lost, be no more, be swallowed up, cease to exist, clear , come to naught, dematerialize, depart, die , die out, dinah, disperse, dissipate, dissolve, drop out of sight, end gradually, escape, evanish, evaporate, expire, fade away, flee, go south, leave no trace, melt away, pass, perish, recide, sink , take flight, vacate, withdraw