sand-blind (adj.)youdaoicibaDictYouDict[sand-blind 词源字典]
also sandblind, "half-blind," c. 1400, probably altered (by influence of sand) from Old English *samblind, the first element from West Germanic *sami-, from PIE *semi- (see semi-); compare Old English samlæred "half-taught, badly instructed," samstorfen "half-dead."[sand-blind etymology, sand-blind origin, 英语词源]