smirch是什么意思

smirch

英 [smɜːtʃ] 美 [smɝtʃ]

smirch (v.): late 15c., "to discolor, to make dirty," of uncertain origin, perhaps from Old French esmorcher "to torture," perhaps also "befoul, stain," from es- "out" (see ex-) + morcher "to bite," from Latin morsus, past participle of mordere "to bite" (see mordant). Sense perhaps influenced by smear. Sense of "dishonor, disgrace, discredit" first attested 1820.
smirch (n.): 1680s, "a soiling mark or smear," from smirch (v.). Figurative use by 1862.

1. The compound material of resin matrix may produce serious smirch phenomenon during the minute hole drilling.: 以树脂为基体的复合材料在微孔加工中会产生严重污斑现象.