This is the 5167th most frequent Spanish word.
hacerle
"To do something to/for someone" or "to make something for someone."
The word "hacerle" refers to the act of doing (hacer) something for him/her (-le).
Le pregunté si podía hacerle un favor a su amigo.
I asked him if he could do a favor for his friend.
The word "hacerle" means to make (hacer) him/her (-le) understand.
No pude hacerle entender el problema que teníamos.
I couldn't make him understand the problem we had.
The word "hacerle" refers to the act of making (hacer) someone (le) aware of something.