The word(s) "unbeliever" appears 179 time(s) in 160 verse(s) in Quran in Abdullah Yusuf Ali translation.

(81) Or (the unbelievers' state) is like the depths of darkness in a vast deep ocean, overwhelmed with billow topped by billow, topped by (dark) clouds: depths of darkness, one above another: if a man stretches out his hands, he can hardly see it! for any to whom Allah giveth not light, there is no light!

(82) Never think thou that the unbelievers are going to frustrate (Allah's Plan) on earth: their abode is the Fire,- and it is indeed an evil refuge!

(83) And the (unbelievers) must indeed have passed by the town on which was rained a shower of evil: did they not then see it (with their own eyes)? But they fear not the Resurrection.

(84) Therefore listen not to the unbelievers, but strive against them with the utmost strenuousness, with the (Qur'an).

(85) The unbelievers say: "What! when we become dust,- we and our fathers,- shall we really be raised (from the dead)?

(86) And the unbelievers say to those who believe: "Follow our path, and we will bear (the consequences) of your faults." Never in the least will they bear their faults: in fact they are liars!

(87) And thus (it is) that We have sent down the Book to thee. So the People of the Book believe therein, as also do some of these (pagan Arabs): and none but unbelievers reject our signs.

(88) And if We (but) send a Wind from which they see (their tilth) turn yellow,- behold, they become, thereafter, Ungrateful (unbelievers)!

(89) verily We have propounded for men, in this Qur'an every kind of Parable: But if thou bring to them any Sign, the unbelievers are sure to say, "Ye do nothing but talk vanities."

(90) Say: "On the Day of Decision, no profit will it be to unbelievers if they (then) believe! nor will they be granted a respite."