deaf-and-dumb ['defәn'dʌm]
adj.
聋哑的
deaf-and-dumb[ adj ]
lacking the sense of hearing and the ability to speak
<adj.all>
deaf and dumb \deaf and dumb\, deaf-and-dumb \deaf-and-dumb\adj.
both deaf and unable to speak; without the sense of hearing
or the faculty of speech. Same as {Deaf-mute}.
[1913 Webster +PJC]