This root form (lemma) is used in 3 different forms in the NT: ἀλάλους (AMP), ἄλαλον (ANS), ἄλαλον (VNS).
It is glossed in 2 different ways: ‘the mute’, ‘mute’.
OET MARK 7:37 Greek word=ἀλάλους (alalous) Morphology=AMP English gloss=‘the mute’ SR GNT MARK 7:37 word 18
OET MARK 9:17 Greek word=ἄλαλον (alalon) Morphology=ANS English gloss=‘mute’ SR GNT MARK 9:17 word 21
OET MARK 9:25 Greek word=ἄλαλον (alalon) Morphology=VNS English gloss=‘mute’ SR GNT MARK 9:25 word 24