This is the 2995th most frequent French word.
insuffisant
Not enough; inadequate.
Here 'insuffisant' is used to describe the quantity or adequacy of the exam result, implying it did not meet the required standard level.
Le résultat de l'examen était insuffisant pour passer.
The exam result was insufficient to pass.
In this sentence, 'insuffisant' is applied to quantify the number of chairs, indicating that their amount was not adequate for the needs of the situation.
Il y avait un nombre insuffisant de chaises pour tous les invités.
There was an insufficient number of chairs for all the guests.
The term 'insuffisant' is used here to characterize the quality or amount of effort provided, showing it was not SUFFICIENT to accomplish the intended outcome.