adjective ardent, zealous, strenuous, active DN.iii.58, DN.iii.76 sq., DN.iii.141 (+ sampajāna), DN.iii.221, DN.iii.276; MN.i.22 MN.i.56, MN.i.116, MN.i.207, MN.i.349; MN.ii.11; MN.iii.89, MN.iii.128, MN.iii.156; SN.i.113, SN.i.117 sq., SN.i.140, SN.i.165; SN.ii.21, SN.ii.136 sq.; SN.iii.73 sq.; SN.iv.37, SN.iv.48, SN.iv.54 SN.iv.218; SN.v.165, SN.v.187, SN.v.213; AN.ii.13 sq.; AN.iii.38, AN.iii.100 sq.; AN.iv.29, AN.iv.177 sq., AN.iv.266 sq., AN.iv.300, AN.iv.457 sq.; AN.v.343 sq.; Snp.926 Mnd.378; Iti.41, Iti.42; Vb.193 sq.; Mil.34, Mil.366; Vism.3 (= viriyavā); Dhp-a.i.120; Snp-a.157, Snp-a.503
■ Freq. in the formula of Arahantship “eko vūpakaṭṭho appamatto ātāpī pahitatto”: see arahant II. B. See also satipaṭṭhāna. Opp. anātāpin SN.ii.195 sq.; AN.ii.13; Iti.27 (+ anottappin).

fr. ātāpa, cp. BSk. ātāpin Avs.i.233; Avs.ii.194 = Divy.37; Divy.618