This root form (lemma) is used in 3 different forms in the NT: ἀπεφθέγξατο (IAM3··S), ἀποφθέγγεσθαι (NPM····), ἀποφθέγγομαι (IPM1··S).
It is glossed in 3 different ways: ‘to_be speaking_out’, ‘I am speaking_out’, ‘spoke_out’.
OET ACTS 2:4 Greek word=ἀποφθέγγεσθαι (apofthengesthai) Morphology=NPM···· English gloss=‘to_be speaking_out’ SR GNT ACTS 2:4 word 18
OET ACTS 2:14 Greek word=ἀπεφθέγξατο (apefthegxato) Morphology=IAM3··S English gloss=‘spoke_out’ SR GNT ACTS 2:14 word 17
OET ACTS 26:25 Greek word=ἀποφθέγγομαι (apofthengomai) Morphology=IPM1··S English gloss=‘I am speaking_out’ SR GNT ACTS 26:25 word 14