surd英语原文释义、词形变化、词源和词汇关系

英文释义

名词 n.

An irrational number, especially one expressed using the √ symbol.
A voiceless consonant.

形容词 adj.

Lacking the sense of hearing; deaf. obsolete

— …how all Words fall to the Ground, spent upon such a surd and Earless Generation of Men, stupid unto all Instruction…
unheard obsolete

— To this errour, of blending the ſurd and vocal modes of articulation together, may be added the too frequent uſe of compound articulations both vocal and ſurd.
Involving surds, or irrational numbers; not capable of being expressed in rational numbers.

— a surd expression or quantity; a surd number
unvoiced; voiceless

词形变化

surds plural more surd comparative most surd superlative

词汇关系

衍生词

quadratic surd surdity surdization

词源

词源 1

First attested in the mid 16th century from Latin surdus (“deaf, mute”), used in mathematics for “irrational,” reflecting ἄλογος (álogos, “irrational, speechless”) as found in Euclid, apparently transmitted via Arabic جِذْر أَصَمّ (jiḏr ʔaṣamm, “deaf root”). The phonetic sense, “voiceless,” emerged in the 18th century. Doublet of surdo.

词源 2

First attested in the mid 16th century from Latin surdus (“deaf, mute”), used in mathematics for “irrational,” reflecting ἄλογος (álogos, “irrational, speechless”) as found in Euclid, apparently transmitted via Arabic جِذْر أَصَمّ (jiḏr ʔaṣamm, “deaf root”). The phonetic sense, “voiceless,” emerged in the 18th century. Doublet of surdo.