روأ2 روّأ فِى الأَمْرِ, (T, S, M, Mgh, Msb, K, &c.,) inf. n. تَرْوِئَةٌ, (S, Mgh, K,) or تَرْوِيَةٌ, (so in one of my copies of the S,) after the manner of a verb with an infirm final radical, like تَزْكِيَةٌ, inf. n. of زَكَّى, (TA,) and تَرْوِىْءٌ, (S, K,) agreeably with analogy; (TA;) and, accord. to IDrst, in his Expos. of the Fs, رَوَّى also is allowable; but the former is the original; or, accord. to the L, the former is anomalous, like حَلَّأْتُ in the phrase حَلَّأْتُ السَّوِيقَ; (TA;) He looked into the thing, or affair, or case; inspected it; examined it; considered it; or thought upon it; (S, M, Mgh, Msb, K;) and thought upon it repeatedly; syn. تَعَقَّبَهُ; (M, L, K, TA;) i. e. رَدَّدَ فِيهِ فِكْرَهُ; (TA;) not hastening to reply: (S, K:) and رَيَّأَ signifies the same; (K in art. ريأ;) i. q. فَكَّرَ; (T;) or, accord. to some, it is a mispronunciation. (MF.) b2:  Hence, يَوْمُ التَّرْوِيَةِ The eighth day of [the month] Dhu-l-Hijjeh; originally with ء: its  derivation from الرُّؤْيَةُ is a mistake; and its derivation from الرِّىُّ requires consideration. (Mgh.) [See 2 in art. روى.]4 أَرْوَأَ It (a place) abounded with the [kind of plant, or tree, called] رَآء: (Az, AAF, K:) or so أَرْوَأَتْ, said of land (أَرْض). (M.) رَآءٌ A kind of [plant, or] tree, (T, * S, M, K, &c.,) that grows in plain, or soft, land, (T, M, TA,) having a white fruit: or, as some say, a kind of dust-coloured tree, having a red fruit: (M, TA:) n. un. رَآءَةٌ: (T, S, M, K:) and dim.↓ رُوَيْئَةٌ: (M, TA:) AHn says that the رآءة is not taller nor broader than a sitting man: and accord. to one of the Arabs of the desert of 'Omán, it is a tree that rises on a stem, and then there branch forth [so in the M, but accord. to the TA, rise,] from it round, rough leaves: others, he adds, say that it is a small tree of the mountains, resembling an عظلمة [q. v.], having a soft white flower like cotton: (M, TA: [but in the latter, the word rendered “ soft ” is omitted:]) some say that it is a species of the kind of tree called طَلْح [acacia, or mimosa, gummifera], and is the tree that grew at the cave in which were the Prophet and Aboo-Bekr: so say Suh and others: it is, they say, of the height of a man, and has white flowers, resembling cotton, with which cushions are stuffed, like feathers in lightness and softness: it is said by IHsh to be the same [tree] that is called أُمُّ غَيْلَان [see art. غيل]; but they have found fault with him. [for so saying]: it is not the عُشَر [asclepias gigantea], as one author has supposed; but a tree resembling this: (MF, TA:) such is the truth: the رآء is not the عشر: I  have seen them both [says SM] in El-Yemen; and with the fruit of each of them cushions and pillows are stuffed: but the fruit of the عشر commences small; then increases to the size of the باذنجانة [or fruit of the egg-plant, and much larger, like a bladder]; and then breaks open, disclosing what is like cotton: and the fruit of the رآء is not thus: the عشر [he adds] is not found in Egypt; but it and the رآء are peculiar to El-Hijáz and the neighbouring parts; [in saying this, however, he errs; for I have seen the عشر in abundance in the deserts of the upper part of the Sa'eed;] and the saddles of camels &c. are stuffed with the fruit of the رآء in El-Hijáz. (TA.) b2: Also The foam of the sea. (AHeyth, K.) A2: And One of the letters of the alphabet. (TA.) [See the letter ر.]A3:  See also art. ريأ.رَآءَةٌ n. un. of رَآءٌ. (T, S, M, K.) A2:  See also رَايَةٌ, in art. رى.رَوِيْئَةٌ, or, as some say, only رَوِيَّةٌ, without ء; (M;) the latter was the usual form, without ء; (S, Msb;) or each; (K;) a subst. from رَوَّأَ فِى; الأَمْرِ; (S, K;) meaning Inspection, examination, consideration, or thought; (S, * M, Msb, K; *) and repeated inspection or examination or consideration; (M, * Msb, K, * TA;) or consideration of the issues, or results, of an affair; (Msb;) without haste to reply. (S, * K, * TA.) You say, فُلَانٌ لَيْسَ لَهُ رَوِيَّةٌ [Such a one has no inspection, &c.]. (T.) It precedes what is termed عَزِيمَةٌ [i. e. resolution, or determination, &c.], and follows what is termed بَدِيهَةٌ [i. e. intuitive knowledge, &c.]: one has well said, بَدِيهَتُهُ تَحُلُّ عُرَى المَعَانِىإِذَا انْغَلَقَتْ فَتَكْفِيهِ الرَّوِيَّهْ [His intuitive knowledge undoes the loops of meanings when they are fast closed, and inspection suffices him]. (Har p. 8.) [See also رَوِيَّةٌ in art. روى.]رُوَيْئَةٌ dim. of رَآءٌ, q. v. (M, TA.) قَصيدَةٌ رَائيَّةٌ and رَاوِيَّةٌ and رَيِّيَّةٌ A قصيدة of which the رَوِىَّ is ر. (TA in باب الالف الليّنة.)