This is the 10189th most frequent French word.
imparable
Unstoppable; unbeatable; unavoidable.
Here, 'imparable' means 'unassailable' or 'irrefutable', indicating that the reasoning is solid and cannot be countered.
Son raisonnement était imparable, personne ne pouvait le contredire.
His reasoning was unassailable; no one could contradict him.
In this context, 'imparable' means 'unstoppable' or 'impossible to prevent', referring to the action of the goalkeeper's save.
Le gardien de but a fait un arrêt imparable, sauvant son équipe du but certain.
The goalkeeper made an unpreventable save, rescuing his team from the certain goal.
Here, 'imparable' is used metaphorically to describe an undeniable or unstoppable ability or trait.