Most potassium occurs in the Earth's crust as minerals, such as feldspars and clays. Potassium is leached from these by weathering, which explains why there is quite a lot of this element in the sea (0.75 g/liter). Minerals mined for their potassium are pinkish and sylvite, carnallite and alunite.
oppression - the act of subjugating by cruelty; the tyrant's oppression of the people. 2. oppression - the state of being kept down by unjust use of force or authority: after years of oppression they finally revolted. subjection, subjugation - forced submission to control by others. yoke - an oppressive power; under the yoke of a tyrant; they threw off the yoke of domination.
oppo (plural oppos) ( 1 Britain, slang) A friend, associate or colleague. [from 20th c.] quotations â¼ 2016, Alan Moore, Jerusalem, Liveright 2016, p. 53: âIt's all right, chaps, the decorator's come. (US, politics, informal) Research into one's opponent's family, friends, and past, which aims to uncover activities or interests which embarrass or discredit them (short for oppo research).