To become less firm, tense, or rigid.

变宽；放松；松弛。

To be remiss or less diligent.

疏忽；懈怠。

To languish; become slower.

萎靡；缓慢。

To slake.

消解。

To retard; slow down.

迟延；减速。

To cause to decline or become less vigorous.

使弱；使减弱。

To slake, as lime.

使消除(如石灰)。

To loosen; reduce the tension of.

使宽松；使松懈。