détruirions
Détruirions is a French verb form. Specifically, it is the first-person plural conditional present of the verb "détruire," which means "to destroy." The conditional mood in French is often used to express hypothetical situations, polite requests, or future actions viewed from a past perspective. Therefore, "détruirions" translates to "we would destroy."
For example, in a sentence like "Si nous avions les moyens, nous détruirions le bâtiment," the meaning