This is the 1984th most frequent French word.
ultime
Final; ultimate.
Here, the word 'ultime' modifies 'décision' (decision), indicating the final or conclusive nature of the decision.
La décision ultime revient au directeur.
The ultimate decision rests with the director.
In this sentence, 'ultime' describes 'tentative' (attempt), emphasizing it as a last effort made.
C'était son ultime tentative pour résoudre le problème.
It was his final attempt to solve the problem.
'Ultime' is used to qualify 'partie' (part), denoting it as the concluding segment of a sequence.