قمطرQ. 4 إِقْمَطَرَّ It (a day, S) was, or became, distressful, or calamitous. (S, K.) قَمْطَرٌ: see قَمْطَرِيرٌ.قِمَطْرٌ and قِمَطْرَةٌ (S, Msb, K) and with tesh-deed, [i. e. قِمَّطْرٌ and قِمَّطْرَةٌ,] but this pronunciation is extr., (K,) or, accord. to Yaakoob, (S,) or ISk, (TA,) not allowable, (S, TA,) A repository for books or writings, (S, Msb, K, TA,) resembling a سَفَط, [q. v., (in the TA, سقط, which is evidently a mistake,)] made of reeds woven together: (TA:) the first word is fem., like the second, as well as masc.: (Msb:) pl. قَمَاطِرُ. (S, Msb.) يَوْمٌ قَمْطَرِيرٌ, and ↓ قُمَاطِرٌ, (S, K,) and ↓ مُقْمَطِرٌّ, (TA,) A distressful, or calamitous, day: (S, K:) or a day that makes one knit the brow, or contract the skin between the eyes: so the first is explained by some as occurring in the Kur lxxvi.10. (TA.) b2:  شَرٌّ قَمْطَرِيرٌ, (TA,) and ↓ قُمَاطِرٌ, and ↓ قَمْطَرٌ, (Lth, TA,) and ↓ مُقْمَطِرٌّ, (TA,) Intense evil. (Lth, TA.) قُمَاطِرٌ: see قَمْطَرِيرٌ, in two places.مُقْمَطِرٌّ: see قَمْطَرِيرٌ, in two places.