Thou shalt be dumb — The Greek word signifies deaf, as well as dumb: and it seems plain, that he was as unable to hear, as he was to speak; for his friends were obliged to make signs to him, that he might understand them, Luke 1:62.
Related Commentaries of Luke 1:20
Luke 1:20
20 And, behold, thou shalt be dumb, and not able to speak, until the day that these things shall be performed, because thou believest not my words, which shall be fulfilled in their season.