The word(s) "thoroughly" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) (As for) those who disbelieve in Our communications, We shall make them enter fire; so oft as their skins are thoroughly burned, We will change them for other skins, that they may taste the chastisement; surely Allah is Mighty, Wise.

(2) And you see the mountains, you think them to be solid, and they shall pass away as the passing away of the cloud-- the handiwork of Allah Who has made every thing thoroughly; surely He is Aware of what you do.