The word(s) "opponents" appears 2 time(s) in 2 verse(s) in Quran in Saheeh International translation.

(1) And of the people is he whose speech pleases you in worldly life, and he calls Allah to witness as to what is in his heart, yet he is the fiercest of opponents.

(سورة البقرة, Al-Baqara, Chapter #2, Verse #204)
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(2) No! Those "gods" will deny their worship of them and will be against them opponents [on the Day of Judgement].

(سورة مريم, Maryam, Chapter #19, Verse #82)
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