Usage Note
Déloyal is the opposite of loyal and carries a strong moral charge. The plural masculine form is déloyaux, and the feminine singular is déloyale. The related noun is déloyauté (disloyalty). In sport and business, concurrence déloyale means unfair competition, a term with precise legal meaning in French law.
Examples
"Ce comportement est franchement déloyal."
Natural Translation
This behaviour is frankly disloyal.

Free starter pack
Building your French vocabulary?
Get the 100 most common French words as a free PDF — one email, no spam.
Related Words
Explore French by topic
FrenchNow
7 min read