جرف

جُرُفٌ جرف and ↓ جُرْفٌ, (S, Msb, K, &c.,) the latter a contraction of the former, (Msb,) [ An abrupt, water-worn, bank or ridge; ] a bank (جَانِبٌ Ksh and Jel in ix. 110) of a valley, the lower part of which is excavated by the water, and hollowed out by the torrents, so that it remains uncompact, unsound, or weak; (Ksh ib.;) a bank, or an acclivity, of a water-course of a valley and the like, when the water has carried away from its lower part, and undermined it, so that it has become like what is termed a دَحْل, with its upper part overhanging; (L;) a portion of land (or sand, S in art. تهر) which the torrents have partially swept away, or worn away, (↓ تَجَرَّفَتْهُ, S, K, or ↓ جَرَفَتْهُ, Msb,) and eaten; (S, Msb, K;) a portion of the lower part of the side of a valley, and of a river, eaten by the torrent; (M, TA;) the side of the bank of a river, that has been eaten by the water, so that some part of it every little while falls: (Har p. 47:) and the latter, [or each,] a place which the torrent does not take away; as also ↓ جِرْفٌ; (K;) [i. e. a bank, or ridge, that remains rising abruptly by the bed of a torrent or stream: ] pl. [of pauc.] (of جُرُفٌ, TA) أَجْرَافٌ, (K,) like أَطْنَابٌ pl. of طُنُبٌ, (TA,) and [of mult.] (of جُرْفٌ, though it is implied in the K that it is of جُرُفٌ, TA) جِرَفَةٌ, like جِحَرَةٌ (S, K) pl. of جُحْرٌ, (S,) and جُرُوفٌ. (ISd, TA.)