the deep end

the end of a swimming pool where the water is deepest

深水區

go off (或 go in off) the deep end

(informal)give way immediately to an emotional outburst, especially of anger

(非正式)發作（尤指因憤怒）

in deep water (或 waters)

(informal)in trouble or difficulty

(非正式)遇上麻煩，處于困境

he landed in deep water when he began the affair.

他開始婚外戀的時候就惹上麻煩了。

jump (或 be thrown) in at the deep end

(informal)face a difficult problem or undertaking with little experience of it

(非正式)碰上難題，撞上麻煩

deep down

At bottom; basically

在內心深處；根本上

Deep down, she was still a rebel.

她實質上仍是個叛逆者

in deep water

In difficulty.

陷入麻煩