قوس

5 تقوّس ذ It (a thing) became bowed, or bent; as also ↓ استقوس: (TA:) the ↓ latter is also said, tropically, of the moon when near the change [&c.]. (A, TA.) ― -b2- (tropical:) He (an old man, S, A) became bowed, or bent; (A, * K;) as also ↓ قَوَّسَ, inf. n. تَقْوِيسٌ; (S, A, * Msb, K;) and ↓ استقوس; (S;) and ↓ اقوس: (A:) or he became bowed, or bent, in the back; as also ↓ قَوَّسَ; and ↓ استقوس; (TA;) and so ↓ قَوِسَ, aor. قَوَسَ , inf. n. قَوَسٌ. (K.) -A2- تقوّس قَوْسَهُ He put his bow upon his back. (TA.)