Démontrais
Démontrais is a French verb. It is the first-person singular imperfect indicative form of the verb "démontrer," which means to demonstrate, to prove, or to show. As such, "démontrais" translates to "I was demonstrating," "I was proving," or "I used to demonstrate," "I used to prove." This verb tense is used to describe an action that was ongoing or habitual in the past. For instance, in a sentence like "Je démontrais la théorie de la relativité à mes étudiants," it means "I was demonstrating the theory of relativity to my students" or "I used to demonstrate..."
The root verb "démontrer" itself is derived from Latin "demonstrare," meaning to point out or to show.