imparable

In a sentence

• Son raisonnement était imparable, personne ne pouvait le contredire.

  His reasoning was unassailable; no one could contradict him.

  Here, 'imparable' means 'unassailable' or 'irrefutable', indicating that the reasoning is solid and cannot be countered.

• 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.

  In this context, 'imparable' means 'unstoppable' or 'impossible to prevent', referring to the action of the goalkeeper's save.

• Elle possède une force de persuasion imparable qui lui permet de convaincre n'importe qui.

  She has an unassailable persuasive power that enables her to convince anyone.

  Here, 'imparable' is used metaphorically to describe an undeniable or unstoppable ability or trait.