ربع

الأَرْبِعَاآءُ ذ , [also written without tenween when not rendered determinate by the article or otherwise accord. to most authorities, who make it fem., but with tenween when indeterminate accord. to those who make it masc.,] and الأَرْبَعَاآءُ, (As, S, Msb, K,) the latter on the authority of some of the BenooAsad, (S, Msb,) and الأَرْبُعَاآءُ, (As, Msb, K,) which is a form of the word seldom used, (Msb,) and الاـِرْبِعَاآءُ, and الاـِرْبَعَاآءُ, the last two mentioned by IHsh, the first of all the most chaste, (MF,) but it is the only sing. word of its measure, (El- Kutabee, Msb,) except أَرْمِدَاآءُ, (AZ, O,) the name of A certain day; (S, Msb, K;) [namely Wednesday; ] the fourth day of the week; (L;) as also ↓ الرَّبُوعُ; but this is post-classical: (TA:) the dual of أَرْبِعَاآء is أَرْبِعَاوَانِ; (L;) and the pl. is أَرْبِعَاوَاتٌ, (S, L,) [accord. to those who make the sing. fem.;] or the dual is أَرْبِعَاآءَانِ, and the pl. is أَرْبِعَاآءَاتٌ; (K;) thus says Aboo-Jukhádib, regarding the noun as masc.: (Fr:) Aboo-Ziyád used to say, مَضَى الأَرْبِعَاآءُ بِمَا فِيهِ [ Wednesday passed with what ( occurred ) in it ], making it sing. and masc. [because he meant thereby يَوْمُ الأَرْبِعَاآءُ]; but Abu-l-Jarráh used to say, مَضَتِ الأَرْبِعَاآءُ بِمَا فِيهِنَّ, making it fem. and pl., and employing it like a n. of number: (Lh:) Th is related to have mentioned أَرَابِيعُ as a pl. of الأَرْبِعَاآءُ; but ISd says, I am not sure of this. (TA.) The word has no dim. (Sb, S in art. امس.)