/ ˈtʃæmfə(r); NAmE / noun
( technical ) a cut made along an edge or on a corner so that it slopes rather than being at 90°
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WORD ORIGIN
mid 16th cent. (in the sense flute or furrow ): back-formation from chamfering , from French chamfrain , from chant edge (see the verb cant ) + fraint broken (from Old French fraindre break, from Latin frangere ).