ecru (adj.)youdaoicibaDictYouDict[ecru 词源字典]
1869, "having the color of raw silk or unbleached linen," from French écru "raw, unbleached," from Old French escru "raw, crude, rough" (13c.), from es- "thoroughly" (see ex-) + Latin crudus "raw" (see crude).[ecru etymology, ecru origin, 英语词源]