Borrowed from Latin cortex ( “ cork, bark ” ) .
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Lewis’s Elementary Latin Dictionary
1890 American Book Company edition; pinned Perseus XML digitizationcortex
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From Proto-Indo-European * (s)kort-ek-s , from Proto-Indo-European * (s)kert- , extended from * (s)ker- ( “ to cut ” ) .
Cognate with Ancient Greek κείρω ( keírō , “ to cut off ” ) , English shear , German scheren , Albanian harr ( “ to cut, to mow ” ) , Lithuanian ski̇̀rti ( “ separate ” ) , Welsh ysgar ( “ separate ” ) , Old Armenian քերեմ ( kʻerem , “ to scrape, scratch ” ) . See also scortum ( “ skin, hide ” ) .
Borrowed from French cortex , Latin cortex .
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