This root form (lemma) is used in 2 different forms in the NT: ἐθαμβήθησαν (IAP3··P), ἐθαμβοῦντο (IIP3··P).
It is glossed in 3 different ways: ‘were amazed’, ‘were_being amazed’, ‘they were_being amazed’.
OET MARK 1:27 Greek word=ἐθαμβήθησαν (ethambaʸthaʸsan) Morphology=IAP3··P English gloss=‘were amazed’ SR GNT MARK 1:27 word 2
OET MARK 10:24 Greek word=ἐθαμβοῦντο (ethambounto) Morphology=IIP3··P English gloss=‘were_being amazed’ SR GNT MARK 10:24 word 5
OET MARK 10:32 Greek word=ἐθαμβοῦντο (ethambounto) Morphology=IIP3··P English gloss=‘they were_being amazed’ SR GNT MARK 10:32 word 17