جأش1 جَأَشَتْ نَفْسُهُ, aor. ـَ His soul rose, or heaved, by reason of grief or fear; (As, K;) a dial. var. of جَاشَتْ, aor. ـِ (TA.) b2:  Also, both of these, His (a coward's) soul purposed flight: or was frightened. (TA in art. جيش.) b3:  جَأَشَإِلَيْهِ, aor. ـَ He came, came forward, or advanced, towards him. (K.) جَأْشْ The return to its place, (رُوَاع, Lth, S, K,) or the fright, (رَوْع, as in a copy of the A, [which latter is agreeable with explanations of the verb given above,]) of the heart, when in a state of commotion on an occasion of fright. (Lth, S, A, K.) A2:  The soul (نَفْس) of a man: (IDrd, A, K:) or his heart: or firmness, or constancy, of heart: or strength of heart when one hears a thing and knows not what it is: (TA:) sometimes, [جَاشٌ,] without ء: (K:) pl. جُؤُوشٌ (K) and جِئَاشٌ. (TA.) You say, فُلَانٌ رَابِطُ الجَأْشِ Such a one restrains his soul, or himself, from flight, by reason of his courage; (S A; *) is strong in heart; as also رَبِيطُ الجَأْشِ: (S in art. ربط:) or both signify is courageous. (K in art. ربط, q. v.) And وَاهِى الجَأْشِ [Infirm, or weak, in soul, or heart]. (A, TA.) And رَبَطَ لِذٰلِكَ الأَمْرِ جَأْشًا, (A,) or جَاشًا only, [without ء,] (ISk, TA,) see art. ربط. And رَبَطَ جَأْشُهُ His  heart became strong. (K in art. ربط q. v.) b2: See also جُؤْشُوشٌ.جُؤْشٌ: see what follows.جُؤْشُوشٌ The breast, or chest; (S, A, K;) as also ↓ جَأْشٌ and ↓ جُؤْشٌ: (A:) or its حَيْزُوم, q. v. (Ibn-'Abbád, K.) b2:  The forepart (صَدْر) of the night; accord. to which explanation it is tropical: or what is between the beginning and the third thereof: or a while thereof: (TA:) or a portion thereof; (Lh, K;) and of people. (K.) A2:  Also A thick, or gross, or coarse, man. (Ibn-'Abbád, K.)