दुश्मन {m/f} enemy (also: foe) शत्रु {m}

enemy noun any hostile group of people. अप्रियः, अभिघातिः, अभिघाती, अमित्रः, अरातिः, अरिः, अहितः, घातकः, दस्युः, दुर्हृद्, दौहृदः, द्विट्, द्विषः, द्विषन्, द्वेषणः, द्वेषी, परः, परिपन्थी, प्रतिपक्षः, प्रत्यर्थो, रिपुः, विद्विट्, विद्विषः, विपक्षः, वृषः, वैरिः, शत्रुः, शात्रवः, सपत्नः, हिंसकः

adversary, agent, antagonist, attacker, bandit, competitor, criminal, detractor, foe, guerrilla, invader, murderer, opponent, opposition, prosecutor, rebel, rival, spy, terrorist, traitor, villain.

"Opp" is a slang abbreviation of the word "opponent" or "enemy." It is commonly used to refer to someone who is viewed as an adversary or someone with whom one has a conflict or disagreement.