adjective which, which one (of two or more) Vin.ii.89; MN.i.7; Ja.i.172; Mil.309; Pv-a.27. In some cases merely emphatic for ko, e.g. Vin.i.30 (katamena maggena āgato?); DN.i.197 (katamo so atta-paṭilābho?); Ja.i.97; Snp.995; Mil.51
■ instr katamena (scil. maggena) adv. by which way, how Mil.57, Mil.58.

cp. Vedic katama, interr. pron. with formation of num. ord., in function = katara, cp antama → antara, Lat. dextimus → dexter