AtApin · adjective
Ātāpin (adjective) [from ātāpa, cf. BHS ātāpin Avś I 233; II 194 = Divy 37; 618] ardent, zealous, strenuous, active D III 58, 76 f., 141 (+ sampajāna), 221, 276; M I 22, 56, 116, 207, 349; II 11; III 89, 128, 156; S 113, 117 f., 140, 165; II 21, 136 f.; III 73 f.; IV 37, 48, 54, 218; V 165, 187, 213; A II 13 f.; III 38, 100 f.; IV 29, 177 f., 266 f., 300, 457 f.; V 343 f.; Snp 926; Nidd I 378; It 41, 42; Vibh 193 f.; Miln 34, 366; Vism 3 (= viriyavā); Dhp-a I 120; Pj II 157, 503. — Frequently in the formula of Arahantship "eko vūpakaṭṭho appamatto ātāpī pahitatto": see Arahant II B. See also satipaṭṭhāna. — opposite anātāpin S II 195 f.; A II 13; It 27 (+ anottappin).
ātāpin , adj. (= Pali id. , from Pali ātāpa, oftener ātappa, zeal , with suffix -in; neither occurs in Skt. ), zealous : °pī, n. sg. Mvy 1805 ; LV 239.4 (apramatta ātāpī); same passage Mv ii.118.11 and 120.3 ; similar phrase ii.285.1 , also Divy 37.10 , MSV i.50.14 etc. , and fem. (apramattā) °pinī Divy 618.3 ; Ud xix.1 (aśvaḥ …) ātāpinaḥ, n. sg. ( ardent, spirited ); Śikṣ 31.3 āhāraprajñātāpino, n. pl. , diligent in making proper distinction in food ( Bendall and Rouse ).
zealous, exerting oneself; zeal; exertion