This is the 281st most frequent Croatian word.
njemu
"Him" (dative case of "on" - he).
'Njemu' is used in the dative case here, indicating the entity that is trusted.
On vjeruje njemu više nego meni.
He trusts him more than me.
'Njemu' is used in the dative case here, indicating the recipient of the action of giving.
Dao sam njemu knjigu.
I gave the book to him.
'Njemu' is used in the locative case here, referring to the subject of conversation.