Uṇha (adj. -- n.) [Vedic uṣṇā f. to oṣati to burn, pp. uṣṭa burnt, Sk. uṣṇa = Lat. ustus; cp. Gr. eu)/w, Lat. uro to burn, Ags. ysla glowing cinders, Lith. usnis nettle] hot, as adj. only in phrase uṇhaŋ lohitaŋ chaḍḍeti to spill hot blood, i. e. to kill oneself DhA i.95; otherwise in cpds.; abs. only as nt. "heat" & always in contrast to sītaŋ "cold" Vin ii.117 (sītena pi uṇhena pi); D ii.15 (opp. sīta); M i.85; A i.145 = 170 = J v.417 (sītaŋ vā uṇhaŋ vā tiṇaŋ vā rajo vā ussāvo vā); Sn 52, 966 (acc ˚); Nd1 486 = Nd2 677 (same as under sita); J i.17 (v.93); Miln 410 (megho uṇhaŋ nibbāpeti); PvA 37 (ati˚).
   -- ākāra appearance of heat, often in phrase (Sakkassa) paṇḍu -- kambala -- silɔāsanaŋ uṇhākāraŋ dassesi, of Sakka's throne showing an appearance of heat as a sign of some extraordinary event happening in the world, e. g. J i.330; v.92; DhA i.17, and passim. -- odaka hot water VvA 68. -- kalla glowing -- hot embers or ashes J ii.94 (so read for ˚kalala); iv.389 (˚vassa, rain of hot ashes, v. l. ˚kukkuḷavassa). -- kāla hot weather Vin ii.209.

Pali-English Dictionary, TW Rhys Davids, William Stede,