Examples

失踪的渔船至今下落不明。

The whereabouts of the missing fishing boat is still unknown. → 不明

查寻失踪的亲人。 → 查寻

探明失踪人员的下落。 → 探明

I'd like to know what became of my cat after he disappeared.

我想知道我的猫失踪了以后怎么样了。

The day before disappearing I'm sure she got a weird phone call from somebody.

我确定她失踪前一天接到了一个奇怪的电话。

The boy who disappeared 5 years ago was believed to be died but actually he was alive.

大家都认为那个5年前失踪的男孩已经死了，但事实上他还活着。 → believe