The word(s) "plain" appears 82 time(s) in 82 verse(s) in Quran in Muhammad Pickthal translation.

(61) And if Our revelations are recited unto them in plain terms, they say: This is naught else than a man who would turn you away from what your fathers used to worship; and they say: This is naught else than an invented lie. Those who disbelieve say of the truth when it reacheth them: This is naught else than mere magic.

(62) And our duty is but plain conveyance (of the message).

(63) And We have not taught him (Muhammad) poetry, nor is it meet for him. This is naught else than a Reminder and a Lecture making plain,

(64) And We blessed him and Isaac. And of their seed are some who do good, and some who plainly wrong themselves.

(65) It is revealed unto me only that I may be a plain warner.

(66) Is he whose bosom Allah hath expanded for Al-Islam, so that he followeth a light from his Lord, (as he who disbelieveth)? Then woe unto those whose hearts are hardened against remembrance of Allah. Such are in plain error.

(67) By the Scripture which maketh plain,

(68) (Liken they then to Allah) that which is bred up in outward show, and in dispute cannot make itself plain?

(69) Nay, but I let these and their fathers enjoy life (only) till there should come unto them the Truth and a messenger making plain.

(70) I am surely better than this fellow, who is despicable and can hardly make (his meaning) plain!