The word(s) "disbelievest" appears 1 time(s) in 1 verse(s) in Quran in Muhammad Pickthal translation.

(1) His comrade, when he (thus) spake with him, exclaimed: disbelievest thou in Him Who created thee of dust, then of a drop (of seed), and then fashioned thee a man?

(سورة الكهف, Al-Kahf, Chapter #18, Verse #37)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)