This is the 81st most frequent Romanian word.
îl
The Romanian word "îl" means "him" or "it" as a direct object pronoun.
In this sentence, 'îl' is the accusative male singular pronoun replacing 'brother' for the verb 'văd'.
Îl văd pe fratele meu în parc.
I see my brother in the park.
Here, 'îl' attached to 'să' becomes 'să-l', referring to 'him' as the object of 'ajut'.
Pot să-l ajut cu tema dacă are nevoie.
I can help him with the homework if he needs.
'Nu-l' (combining 'nu' and 'îl') serves to negate and denote 'him' as the male direct object of the verb 'înțeleg'.