صَايءِفٌ

is used as an imitative sequent in the phrase صَيْفٌ صَايءِفٌ, (S, O, K,) meaning A warm, or hot, [spring or] summer: (PS:) a phrase like لَيْلٌ لَايءِلٌ &c. (S, O.) And one says يَوْمٌ صَايءِفٌ, (S, M, O, Msb, K,) meaning A hot day; (O, K;) and ↓ يَوْمٌ صَافٌ (S, O, K) was sometimes said, meaning صَايءِفٌ; like يَوْمٌ رَاحٌ [as meaning رَايءِحٌ]: (S:) and لَيْلَةٌ صَايءِفَةٌ [a hot night]. (S, O, Msb.)

And مَطَرٌ صَايءِفٌ [apparently Rain coming in the صَيْف, meaning spring; as also ↓ مُصِيفٌ, occurring in a verse cited voce رَسَمَ, q. v.]. (M.) See also صَافٍ in article صفو.