The term "out fox" usually means to outsmart or outwit someone or something. Its antonyms would be words that mean to be outsmarted, fooled, or deceived such as: outdone, outmatched, outplayed, bested, defeated, conquered, overpowered, overwhelmed, and subdued. These words convey a sense of defeat or inferiority, indicating that the person or thing being referred to is not as clever or sharp as the other party. Using these antonyms in a sentence can help to convey the opposite meaning of "out fox", highlighting the failure to succeed in a situation where someone has attempted to outsmart or outwit another person or entity.