بس1 بَسٌّ signifies The act of breaking: or breaking in pieces: syn. حَطْمٌ. (TA.) b2:  [And The act of mixing: see بَسِيسَةٌ. This, or the former, is probably the primary signification.] b3:  [and hence, app.,] بَسَّهُ, aor. ـُ inf. n. بَسٌّ, (M, Msb,) He broke it, crumbled it, or bruised or brayed it; said of wheat, &c.; thus making it what is termed بَسِيسَة: (Msb:) or he mixed it, namely, سَويق [or meal of parched barley or wheat], and flour, &c., with clarified butter, or with olive-oil; thus making it what is termed بسِيسَة: (M:) or he moistened it, namely, سَوِيق, and flour, with a little water; (ISk, Msb;) but making it more moist than one does in the action termed لَتٌّ: (Yaakoob, cited in the S; and ISk, in the Msb:) or بَسٌّ signifies the making, or preparing, بسِيسَة, by stirring about, or moistening, سَوِيق, or flour, or ground أَقِط, with clarified butter, or with olive-oil; (S, K;) after which it is eaten, without being cooked. (S.) b4:  [And hence the saying in the Kur lvi. 5,] وَبُسَّتِ الجِبَالُ بَسًّا And the mountains shall be crumbled with a vehement crumbling, (Lh, M, A, K,) like flour, and سَوِيق, (A,) and become earth: (Fr, K:) or become dust cleaving to the earth: (AO, M, TA:) or be levelled: (M, TA:) or mixed with the dust: (Zj, M, TA:) or reduced to powder and scattered in the wind. (TA.) بَسِيسَةٌ Wheat, &c., broken, or crumbled, or bruised: (Msb:) or سَوِيق [or meal of parched barley or wheat], and flour, &c., mixed with clarified butter, or with olive-oil: (M:) or what is stirred about with olive-oil, or with clarified butter, and not wetted [with water]: (Lh, M:) or سويق, or flour, or ground أَقِط, stirred about, or moistened, with clarified butter, or with oliveoil; (S, K;) after which it is eaten, without being cooked: (S:) or سويق, and flour, moistened with a little water, (ISk, Msb,) but more moist than such as is prepared in the manner termed لَتٌّ; (Yaakoob, cited in the S; and ISk, in the Msb;) and used as travelling-provision: (TA:) and bread dried and pounded, and [mixed with water so that it is] drunk like as سويق is drunk: (M, K: *) IDrd thinks it to be what is termed فَتُوث: also barley mixed with date-stones,  for camels: (M, TA:) or, accord. to As, anything that one mixes with another thing: such as سويق with اقط, which one then moistens with fresh butter: and such as barley with date-stones, which one then moistens, for camels: (Msb, * TA:) pl. بُسُسٌ, (IAar, TA,) which is explained in the K as signifying messes of سويق moistened, or stirred about with water, &c. (أَسْوِقَةٌ مَلْتُوتَةٌ). (TA.)