软弱性的英文：
limpness

A limp handshake.
无力的握手。

Limp-bound: Referring to a book with a limp covers.
软皮装本:用柔软材料作书皮的书籍。

If you live with a lame person, you will learn to limp.
远朱者赤，近墨者黑。

He hurt his foot and limped to the door of the classroom.

He had to limp off with a leg injury.
他腿上有伤，离开时只能一瘸一拐地走。