صَبَبٌ

The descent, (تَصَوُّب, M, L, TA, in the K erroneously written تَصَبُّب, TA,) of a river, or rivulet, or channel of water, or of a road, down a declivity. (M, L, K, TA.)

And A declivity, declivous place, or ground sloping down; (M, A, K, TA;) and (TA) so ↓ صَبِيبٌ, of which the plural is أَصْبَابٌ; (S, TA;) so too ↓ صَبُوبٌ and ↓ صُبُوبٌ, with fet-h and with damm; (TA;) [i. e.] ↓ الصَّبُوبُ signifies that down which you descend, or have descended, (مَا انْصَبَبْتَ فِيهِ,) and its plural is صُبُبٌ [like عُمُدٌ plural of عَمُودٌ]; (M, TA;) [and so ↓ الصُّبُوبُ;] or, as some say, ↓ الصَّبُوبُ, with fet-h, is a name for the water, &c., that is poured out upon a man, like طَهُورٌ and غَسُولٌ; and ↓ صُبُوبٌ, with damm, is plural of صَبَبٌ: but AZ mentions his having heard the Arabs apply ↓ صَبُوبٌ to a declivity, or declivous place; and says that its plural is صُبُبٌ: (TA:) and الصَّبَبُ مِنَ الرَّمْلِ signifies what has poured out or forth or down, of sand: (M, K: *) and the plural of صَبَبٌ is أَصْبَابٌ. (M, K.)