the state of being another person's slave (= a person who is owned by them and has to work for them)

The slaves were kept in bondage until their death. 奴隶们终生受到奴役。

the activity of tying parts of a person's body so that they cannot move in order to get or give sexual pleasure

They were into (= they liked) bondage. 他们有捆绑式性交的癖好。

bondage gear 捆绑式性交器具

be in bondage to somethingidiom literary 受…的束缚