“无影无踪”常见的英文表达有 “completely vanished/disappeared without a trace” 、“nowhere to be seen/found” 或 “gone without a trace” 。以下为具体示例：
completely vanished/disappeared without a trace：
The thief completely vanished without a trace after the robbery.（抢劫后，小偷完全无影无踪了 。）
The plane disappeared without a trace over the ocean.（飞机在大海上空无影无踪地消失了。）
nowhere to be seen/found：
When I turned around, he was nowhere to be seen.（当我转身时，他已经无影无踪了。）
The missing cat was nowhere to be found in the neighborhood.（在附近，这只走失的猫无影无踪 。）
gone without a trace：
He was gone without a trace after the argument.（争吵之后，他就无影无踪了。）
The ancient civilization went without a trace, leaving only ruins.（这个古老的文明无影无踪地消失了，只留下废墟。 ）