The word(s) "bitter" appears 5 time(s) in 5 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) It is He Who has let free the two bodies of flowing water: One palatable and sweet, and the other salt and bitter; yet has He made a barrier between them, a partition that is forbidden to be passed.

(2) But they turned away (from Allah), and We sent against them the Flood (released) from the dams, and We converted their two garden (rows) into "gardens" producing bitter fruit, and tamarisks, and some few (stunted) Lote-trees.

(3) Nor are the two bodies of flowing water alike,- the one palatable, sweet, and pleasant to drink, and the other, salt and bitter. Yet from each (kind of water) do ye eat flesh fresh and tender, and ye extract ornaments to wear; and thou seest the ships therein that plough the waves, that ye may seek (thus) of the Bounty of Allah that ye may be grateful.

(4) Nay, the Hour (of Judgment) is the time promised them (for their full recompense): And that Hour will be most grievous and most bitter.

(5) No food will there be for them but a bitter Dhari'