vanished
n. 突然不见，消失；不复存在，灭绝（vanish 的过去式和过去分词）
例句
He vanished without trace.
他消失得无影无踪。
《牛津词典》
The ship had vanished without (a) trace.
那艘船消失得无影无踪。
He just vanished and was never seen again.
他就这么突然消失了，再也没有人见到过他。
《柯林斯英汉双解大词典》
