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 Qur'an, 76:10. (TA.)

شَرٌّ قَمْطَرِيرٌ, (TA,) and ↓ قُمَاطِرٌ, and ↓ قَمْطَرٌ, (Lth, TA,) and ↓ مُقْمَطِرٌّ, (TA,) Intense evil. (Lth, TA.)