عسو1 عَسَا العُودُ, aor. ـْ inf. n. عُسُوٌّ and عَسَآءٌ, The wood, or stick, was, or became, dry and hard: (As, S:) and عَسَا النَّبَاتُ, (Kh, S, K,) inf. ns. as above, (K, TA,) the plant was, or became, thick, or coarse, or rough, (Kh, S, K,) and dry, (K,) and hard; (TA;) as also عَسِىَ, (Kh, S, TA, [in the CK, in art. عسى, erroneously written عَسَى,]) a dial. var. of the former, (Kh, S,) inf. n. عَسًا. (TA.) b2:  And عَسَتْ يَدُهُ, aor. ـْ inf. n. عُسُوٌّ (El-Ahmar, S, Msb, TA) and عُسِىٌّ, (Msb,) His hand became thick, or coarse, or rough, from work. (El-Ahmar, S, Msb, TA.) b3:  عَسَا said of an old man, aor. ـْ (As, S, Msb, K,) inf. n. عُسِىٌّ, (As, S,) or عُسُوٌّ, (Msb,) or both, and عَسَآءٌ and عَسْوٌ; (K;) and عَسِىَ, (Kh, S, K,) inf. n. عَسًا; (K;) He became aged, or ad-vanced in age, (Msb, K,) and (Msb) in a declining state (S, Msb) by reason of age: like عَتَا. (S.) [See also an explanation of عَتَا more agreeable with the first and second of the significations mentioned in this paragraph.] b4:  And عَسَا اللَّيْلُ The night became intensely dark: (K:) but غَسَا is more known [in this sense]. (TA.) عَسْوٌ i. q. شَمْعٌ [Wax, or wax-candles]. (K.) عَسًا Dates while green and small: (S:) said in the K, in art. عسى, and [before] by Hr as is stated in the handwriting of Aboo-Zekereeyà, to be correctly with غ; but mentioned by Sb in the “ Book of Palm-trees,” and by AHn in the “ Book of Plants,” as being with ع and غ. (TA.) b2:  [Also, as stated by Freytag on the authority of Dmr, The female locust.]عِسْوَةٌ Age; old age. (TA. [See 1.]) عَاسٍ [part. n. of 1;] Thick, coarse, or rough. (TA.) A2:  And The fruit-stalk of the raceme of a palm-tree: (A 'Obeyd, S, and TA in art. عسى:) of the dial. of Belhárith Ibn-Kaab. (TA.) b2: And (TA) Palm-trees (نَخْلٌ). (K, TA, both in art. عسى.) أَعْسَآءٌ [a pl. of which the sing. is not mentioned;] Hard [hollows, or cavities, in stone, or in rugged ground, that retain the water of the rain, such as are termed] أَرْزَان. (TA.)