كوح

كَاحٌ ذ and ↓ كِيحٌ The foot, or base, (عُرْض,) of a mountain: (S, K:) [or] its face, or part facing the spectator, above its foot, or base; syn. سَنَدُ جَبَلٍ: (S:) or its foot, or base, (عرض) and most rugged part: or its سَفْح [i. q. عُرْض]; and the foot, or base, of its face; syn. سَفْحُ سَنَدِهِ: or كِيحٌ signifies the side (نَاحِيَة) of a mountain: and any rugged face of a mountain, above its foot, or base: and in some cases, the side of a valley, when it is rugged, but not unless consisting of the hardest and roughest of stones: (As, TA:) pl. of كَاحٌ, أَكْوَاحٌ; (M;) and (of ↓ كِيحٌ, TA,) أَكْيَاحٌ and كْيُوحٌ (K) and كِيَحَةٌ. (As, T.) ― -b2- أَكْيَحُ ↓ كِيحٌ A rough or rugged [ foot, or base, or face above the foot or base, &c., of a mountain ]; an expression similar to يَوْمٌ أَيْوَمُ; (K, art. كيح;) the latter word being a corroborative; for the سَنَد of a mountain is called كيح only because of its ruggedness and roughness. (TA.)