This is the 1832nd most frequent Russian word.
нему
"Нему" means "to him" or "toward him" in English.
The word 'нему' is used in the dative case to indicate the direction of movement towards a particular person, translated as 'him' in this context.
Я подошёл к нему, чтобы поздороваться.
I approached him to say hello.
Here, 'нему' again reflects the dative case, showing the recipient of the action, specifically to whom the letter is sent.
Поэтому мы отправили письмо к нему.
Therefore, we sent the letter to him.
Although the given sentence uses 'ему' (a related form in dative case), it represents trusting and relying on someone, here replacing 'нему' in a fitting role for the grammatical structure.