Etymology
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cauterize (v.)

"to burn or sear (morbid flesh) with a hot iron," c. 1400, from Old French cauterisier, from Late Latin cauterizare "to burn or brand with a hot iron," from Greek kauteriazein, from kauter "burning or branding iron," from kaiein "to burn," a word of uncertain origin. Related: Cauterized; cauterizing.

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Definitions of cauterize

cauterize (v.)
burn, sear, or freeze (tissue) using a hot iron or electric current or a caustic agent;
The surgeon cauterized the wart
Synonyms: cauterise / burn
cauterize (v.)
make insensitive or callous; deaden feelings or morals;
Synonyms: callous / cauterise
From wordnet.princeton.edu