Etymology
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chamfer (n.)

c. 1600, "small groove cut in wood or stone," from French chanfraindre (15c., Modern French chanfreiner), past participle of chanfraint, a word of uncertain origin. The second element seems to be from Latin frangere "to break" (from PIE root *bhreg- "to break"); perhaps the whole word is cantum frangere "to break the edge."

Meaning "sloping surface in place of a square edge or corner" is attested from c. 1840, but the connection to the other sense is uncertain. As a verb from 1560s, "cut a furrow in;" from 1680s as "cut or grind into a symmetrical sloping edge."

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Definitions of chamfer
1
chamfer (v.)
cut a bevel on; shape to a bevel;
Synonyms: bevel
chamfer (v.)
cut a furrow into a columns;
Synonyms: furrow / chase
2
chamfer (n.)
two surfaces meeting at an angle different from 90 degrees;
Synonyms: bevel / cant
From wordnet.princeton.edu