We were hopelessly lost in the fog. 我们在雾中完全迷路了。

hopelessly confused/outnumbered/congested 被彻底搞糊涂了/数量上完全被压倒/交通完全堵塞的

Janet is hopelessly in love (=very much in love) . 珍妮特坠入情网，不能自拔。

The prisoners walked hopelessly around their cells. 囚犯们在牢房里绝望地转来转去。