surd

Etymology
Borrowed from ; in mathematical sense, "deaf to reason", i.e. irrational.

Noun

 * 1)  An irrational number, especially one expressed using the √ symbol.
 * 2)  A voiceless consonant.

Adjective

 * 1)  Lacking the sense of hearing; deaf.
 * 2) * 1670s, published 1716,, , part 3, section 6:
 * …how all Words fall to the Ground, spent upon such a surd and Earless Generation of Men, stupid unto all Instruction…
 * 1)  unheard
 * 2)  Involving surds, or irrational numbers; not capable of being expressed in rational numbers.
 * a surd expression or quantity; a surd number
 * 1)  unvoiced; voiceless
 * 1)  unvoiced; voiceless

Etymology
From. Compare 🇨🇬.

Adjective

 * 1) deaf

Etymology
, from. Compare 🇨🇬.

Adjective

 * 1) deaf