This root form (lemma) is used in 3 different forms in the NT: ἀποκτέννεσθαι (NPP····), ἀποκτέννοντες (PPA·NMP), ἀποκτεννόντων (PPA·GMP).
It is glossed in 2 different ways: ‘to_be_being killed_off’, ‘killing_off’.
OET MARK 12:5 Greek word=ἀποκτέννοντες (apoktennontes) Morphology=PPA·NMP English gloss=‘killing_off’ SR GNT MARK 12:5 word 20
OET MAT 10:28 Greek word=ἀποκτεννόντων (apoktennontōn) Morphology=PPA·GMP English gloss=‘killing_off’ SR GNT MAT 10:28 word 8
OET REV 6:11 Greek word=ἀποκτέννεσθαι (apoktennesthai) Morphology=NPP···· English gloss=‘to_be_being killed_off’ SR GNT REV 6:11 word 39