جَسَا, (Ṣ, M, Mṣb, Ḳ,) aor. ـُ {يَجْسُوُ}, (M, Mṣb, Ḳ,) inf. n. جَسْوٌ (M, Ḳ) and جُسُوٌّ, (M, TA,) He, or it, (a man, M, TA, or a thing, Mṣb,) was, or became, hard, tough, rigid, or stiff: (M, Mṣb, Ḳ:) [see also جَسَأَ: or, said of a man,] he was, or became, hard, rough, harsh, or ungentle; contr. of لَطُفَ. (Ṣ.) And جَسَتِ اليَدُ, inf. n. جُسُوٌّ and جَسًا, The hand, or arm, was, or became, dry, or tough, or hard, (Ṣ, TA,) in the bones, with little flesh; (TA;) and in the same sense the verb is said of other things. (Ṣ.)

It (water) congealed, or froze. (Ṣ, TA.)

Also, inf. n. جُسُوٌّ, He (an old man) attained the utmost age [so that his limbs became rigid]. (Ṣ, TA.)

جاساهُ, (Ḳ,) inf. n. مُجَاسَاةٌ, (TA.) He treated him, or regarded him, with enmity, or hostility. (Ḳ, TA.)

يَدٌ جَاسِيَةٌ A hand, or an arm, dry, or tough, or hard, in the bones, with little flesh. (TA.) And دَابَّةٌ جَاسِيَةٌ القَوَائِمِ A beast having tough, or hard, legs. (TA.) And رِمَاحٌ جَاسِيَةٌ Stiff, rigid, or tough, and hard, spears. (TA.) [See also جَاسِئٌ, in art. جسأ.]