to leave someone, especially someone you are responsible for

抛弃，遗弃〔某人〕:

How could she abandon her own child?

她怎么能抛弃自己的孩子？

to go away from a place, vehicle etc permanently, especially because the situation makes it impossible for you to stay

离弃，逃离〔某地方或交通工具等〕;

We had to abandon the car and walk the rest of the way.

我们只好弃车，走完剩下的路。

Fearing further attacks, most of the population had abandoned the city.

由于害怕遭受更多的袭击，大多数市民已逃离该市。

to stop doing something because there are too many problems and it is impossible to continue

放弃，中止:

The game had to be abandoned due to bad weather.

由于天气不好，比赛不得不中止。

They abandoned their attempt to recapture the castle.

他们放弃了夺回城堡的努力。

Because of the fog they abandoned their idea of driving.

因为有雾，他们打消了开车去的念头。

to stop having a particular idea, belief, or attitude

放弃〔信念、信仰或看法〕:

They were accused of abandoning their socialist principles.

他们被指责放弃了社会主义原则。

Rescuers had abandoned all hope of finding any more survivors.

营救人员对找到更多生还者已不抱任何希望。

abandon yourself to sth, [literary] to feel an emotion so strongly that you let it control you completely

沉湎于; 放纵〔感情〕:

She abandoned herself to grief.

她陷入悲痛之中，不能自拔。

abandon ship, to leave a ship because it is sinking

〔由于船在下沉而〕弃船（逃生）

if someone does something with abandon, they behave in a careless or uncontrolled way, without thinking or caring about what they are doing

尽情; 放任:

They drank and smoked with reckless abandon.

他们纵情地喝酒抽烟，毫无顾忌。