SHUAI

There are only about six characters that are pronounced 'shuai', and for many, it isn't even the main  pronunciation. Only two meanings are important.

shuai(1)

摔 = to fall down, to tumble

The more common two-character expression is:

摔倒 = shuai(1)dao(3) = to fall down

This is only used for people.

倒 = dao(3) = to fall

Not to be confused with:

到 = dao(4) = to arrive

If things fall down, the proper word / expression is:

掉 = diao(4) = to fall down

Or:

掉下去 = diao(4) xia(4) qu(4) = to fall down (of things)

shuai(2)

shuai(3)

shuai(4)

帅 = handsome

A combination of the side knife character and the towel character.

This is the appropriate word for good looks in men.

Together with the noun that usually follows it, we get:

帅哥 = shuai(4) ge(1) = handsome older brother

哥 is an endearing designation for an elder male acquaintance