one who practises tapas, an ascetic (brahmin). Eight kinds are enumerated at DN-a.i.270 & Snp-a.295
■ Ja.ii.101, Ja.ii.102; Ja.v.201; Pv-a.153 -pabbajjā the life of an a. Ja.iii.119; Dhp-a.iv.29; DN-a.i.270-f. tāpasī a female ascetic Mhvs.vii.11, Mhvs.vii.12.

from tapa & tapas