فيففَيْفٌ A place that is even, level, or flat: (S, O, K:) or, (K,) accord. to Lth, (T, O,) a waterless desert, (T, M, O, K,) such as is even, level, or flat, and wide, or spacious; (T, O;) and ↓ فَيْفَاةٌ and ↓ فَيفَآءُ (M, K) and ↓ فَيْفَى (K) also signify [thus, or] a waterless desert: (M. K:) and, (K,) accord. to El-Mu-arrij, (T, O,) فَيْفٌ signifies a portion of the earth that is a place whereof the winds are variable; (T, O, K;) and this is the explanation that is preferred by Sh: (T:) and accord. to AA, it signifies [also] any road between two mountains: (T, TA:) its pl. is أَفْيَافٌ [a pl. of pauc.] and فُيُوفٌ [a pl. of mult.]. (T, S, M, O, K.) فَيْفَى: see the preceding paragraph.فَيْفَاةٌ: see فَيْفٌ: and see also مُفَازَةٌ, in art. فوز.فَيْفَآءُ is syn. with فَيْفٌ, q. v.: therefore its ا is augmentative, (S, M,) accord. to Sb (M) and Mbr: (S:) and it signifies (S, M, O,) also (M) a smooth [desert such as is termed] صَحْرَآء: (S, M, O:) its pl. is فَيَافٍ. (S, M, O, K. [In the CK, this pl. is written فِيافٌ, as though it were a pl. of فَيْفٌ.])