This is the 596th most frequent Romanian word.
fim
"Fim" is not a standalone word in Romanian. It may be a form of the verb "a fi" (to be), specifically the subjunctive present, 1st and 2nd person plural ("să fim" - "to be" or "let us be").
In this sentence, 'fim' is used in the subjunctive mood to express a wish or intent for continuing friendship.
Să fim prieteni buni mereu.
Let us always be good friends.
Here, 'fim' functions again in the subjunctive mood to indicate a conditional circumstance or a desired outcome (being punctual).
Dacă vom fi atenți, vom reuși să fim punctuali.
If we are careful, we will manage to be punctual.
In this context, 'fim' is used in a subjunctive construction that describes an important quality or state.