vanish

My keys mysteriously vanished.我的钥匙神秘失踪了。

The missing girl vanished without a trace a year ago.那个女孩一年前突然失踪，音信全无。

The papers seem to have vanished into thin air.那些文件似乎已消失得无影无踪。

Dinosaurs vanished from the face of the earth millions of years ago.数百万年前恐龙就从地球上灭绝了。

The practice has all but vanished. [=the practice is very rare now]这种习俗现在几乎绝迹。