ق • ي • ص

, inf. n. قَيْصٌ: see 7, in two places.

, said of sand, (A, K,) and of dust, or earth, (K,) It poured forth, or down: (K:) or it fell, fell down, or collapsed; and so when said of a building; (A;) and so انقاصت said of a well (بِئْر); (S, A, K;) it fell; fell down; fell in ruins, or to pieces; or collapsed; (S, A, K;) as also انقاضت, with ض; (TA;) and ↓ تقيّصت: (A, K:) which ↓ last also signifies it (a well) inclined, and became demolished, or fell in ruins; and in like manner [تقيّص said of] a wall. (TA.) انقاصت السِّنُّ The tooth became broken: (A:) or became cracked, or split, lengthwise: (TA:) or fell out: (Lth, K:) and ↓ قَاصَتْ, (TA,) inf. n. قَيْصٌ, (S, K,) it fell out from its root; (S, K, TA;) and so with ض: (S, TA:) and انقاص الضِّرْسُ, and ↓ قَاصَ, and ↓ تقّيص, the tooth became cracked lengthwise, and fell out. (TA.) انقاص المَآءُ فِى البِئْرِ The water became abundant in the well (K, TA) so that it nearly demolished it. (TA.)

A well that has collapsed. (A.) And بِئْرٌ قَيَّاصَةُ الجُولِ A well having its wall, or casing, or sides, demolished. (Ibn-'Abbád, K.)

: see مَقْوَسٌ.

signifies Uprooted; (S, K;) and مُنْقَاضٌ, with the pointed ض, cracked or split, lengthwise; so says As.: but AA says, that both signify the same. (S, O.)