ثرو1 ثَرَا القَوْمُ, (As, S, M, K,) aor. ـُ (As, S;) and ثَرِىَ; (T, TT;) inf. n. ثَرًا; (M;) The people, or company of men, became many, much, or great in number or quantity; and increased: (As, T, S, M, K:) and in like manner, المَالُ, (As, S, M, K,) i. e., the cattle, or other property, became many, much, or great in number or quantity. (As, S, M.) b2:  ثَرِىَ, (T, M, K,) aor. ـَ inf. n. ثَرْىٌ [or ثَرًا?] and ثَرَآءٌ, (T, TA,) He (a man, T, K) was, or became, abundant in cattle, or other property; (T, M, K;) as also ↓ اثرى, (T, S, M, Mgh, K,) and أَفْرَى: (M:) or ↓ اثرى signifies he was, or became, in a state of competence or sufficiency, in no need, or rich; syn. استغنى: (Msb:) or it signifies more than استغنى: (T:) and ثَرِيتُ بِكَ, I became, or have become, abundant [in property] by means of thee: (T, S:) and ثَرِيتُ بِفُلَانٍ I  became in no need of other men by means of such a one. (T, S, M.) A poet says, (S,) namely, ElKumeyt, praising the Benoo-Umeiyeh, لَكُمْ مَسْجِدَا اللّٰهِ المَزُورَانِ وَالحَصَىوَأَقْتَرَا ↓ لَكُمْ قِبْصُهُ مِنْ بَيْنِ أَثْرَى[Ye have the two visited mosques of Mekkeh and El-Medeeneh, and ye have the number of the pebbles of such as are between him who is wealthy and him who is poor]: he means, مِنْ بَيْنِ مَنْأَثْرَى وَمَنْ أَقْتَرَ; i.e., مِنْ بَيْنِ مُثْرٍ وَمُقْتِرٍ. (S.) b3: ثَرِيتُ بِكَ, (T,) or بِهِ, inf. n. ثَرًا, (M,) also signifies I rejoiced (T, M) in thee, (T,) or in him, or it: (M:) and ثَرِىَ بِذٰلِكَ, aor. ـَ He rejoiced in, or by reason of, that. (ISk, S.) A2:  ثَرَوْنَاهُمْ We were, or became, more than they: (AA, S, M:) or more in cattle, or other property. (K.) b2:  ثَرَا القَوْمَ He (God) made the people, or company of men, to be many, or numerous; multiplied them. (AA, T, S.) 4 أَثْرَوَ see 1, in three places.A2:  لَا يُثْرِينَا العَدُوُّ The enemy will not say much respecting us. (M, TA.) ثَرًا; dual ثَرَوَانِ: see ثَرًى, in art. ثرى.ثَرٍ: see ثَرِىٌّ. b2:  أَنَا ثَرٍ بِهِ I am in no need of other men by means of him; (T, S, M;) as also ↓ ثَرِىٌّ. (M.) A2:  See also art. ثرى.ثَرْوَةٌ Many, or a great number, (S, M, K,) of men; and of cattle, or other property: (M, K:) or much, or a great quantity, or property; (Mgh, Msb;) as also ↓ ثَرَآءٌ: (S, M, * Mgh:) and فَرْوَةٌ signifies the same as ثَرْوَةٌ; the ف being a substitute for the ث. (M.) One says, إِنَّهُ لَذُو ثَرْوَةٍ↓ وَذُو ثَرَآءٍ, (ISk, S,) or وَثَرْوَةٍ ↓ إِنَّهُ لَذُو ثَرَآءٍ, (T,) Verily he possesses a number [of men] and much property. (ISk, T, S.) Accord. to IAar, one says ثَوْرَةٌ مِنْ رِجَالٍ and ثَرْوَةٌ, meaning A great number of men: but only ثَرْوَةٌ مِنْ مَالٍ. (TA.) b2:  Also The night of the conjunction of the moon and الثُّرَيَّا [or the Pleiades]. (M, K.) ثَرْوَانُ, fem. ثَرْوَى: see ثَرِىٌّ.ثَرَآءٌ: see ثَرْوَةٌ, in three places. b2:  Also A state of competence or sufficiency; or richness. (Msb.) ثَرِىٌّ Many, or numerous; [applied to a company of men;] and so ثَرِيَّةٌ applied to spears (رِمَاحٌ): (TA:) also many, or much, cattle, or other property; (S, M, K, TA;) and so ↓ ثَرٍ. (T, TA.) b2:  Also A man possessing many, or much, cattle, or other property; and so ↓ أَثْرَى; (M, K;) and ↓ مُثْرٍ: (T:) so too ↓ ثَرْوَانُ; (T, S, Mgh;) or abounding (M, K, TA) in cattle, or other property: (TA:) and [its fem.] ↓ ثَرْوَى, applied to a woman, (T, S, M, K,) likewise signifies possessing many, or much, cattle, or other property: (T, S, K:) the dim. of this last is ↓ ثُرَيَّا. (T, S, M, K.) b3:  See also ثَرٍ.A2:  And see art. ثرى.ثُرَيَّا: see ثَرِىٌّ. b2:  الثُّرَيَّا [The Pleiades; the Third Mansion of the Moon: it is believed to be the most beneficial, in its influences on the weather, of all the Mansions of the Moon, on account of the period of its auroral setting, which, in central Arabia, about the commencement of the era of the Flight, began on the 12th of Nov., O. S.: (see مَنَازِلُ القَمَرِ, in art. نزل; and see also نَوْءٌ:) hence what is said of it in Job xxxviii. 31; and hence, as being the most excellent of all asterisms, it is called by the Arabs]النَّجْمُ [the Asterism]: (S, K:) the former appellation is given to it because it comprises, in appearance, many stars in a small space; (M, K; *) for it is said that amid its conspicuous stars are many obscure stars; (IAth, TA;) the number altogether being said to be four and twenty, agreeably with an assertion of the Prophet: some  say that it is so called because of the abundance [of the rain] of its نَوٌء [here meaning auroral setting]: (TA:) the word is thus applied only in the dim. form, which is used in this instance to denote magnification. (M, TA.) b3:  [ثُرَيَّا also signifies (tropical:)  A cluster of lamps, generally resting in holes in the bottom of a lantern: see an engraving in my “Modern Egyptians,” ch. vi.] The ثُرَيَّا of lamps is so called as being likened to the asterism above mentioned. (M.) أَثْرَى: see ثَرِىُّ: A2:  and see also art. ثرى.مُثْرٍ: see ثَرِىُّ: A2:  and see also art. ثرى.مُثْرَاةٌ A cause of multiplying, or rendering abundant; syn. مَكْثَرَةٌ: so in the saying, هٰذَا مَثْرَاةٌ لِلْمَالِ [This is a cause of multiplying, or rendering abundant, cattle, or other property]. (S, K.) أَنَا مَثْرِىُّ بِهِ I am rejoiced in him. (ISk, TA in art. ثرى.) A2:  See also art. ثرى.