1 detective

2 to do detective work

1 weaponry

2 weapons

3 arms

1 surname Li

1 sharp weapon

2 effective implement

3 outstandingly able individual

1 to exploit

2 to make use of

3 to use

4 to take advantage of

5 to utilize

1 small capital, huge profit (idiom); to put in a little and get a lot out

1 spare the rod and spoil the child (idiom)

1 Words of benevolence apply universally (idiom). Humanitarian expressions benefit all.

1 for the convenience and benefit of the people (idiom)

1 to lose one's head through material greed (idiom)