smear (n.) Look up smear at Dictionary.com
"mark or stain left by smearing," 1610s, from smear (v.). Sense of "small quantity prepared for microscopic examination" is from 1903.
smear (v.) Look up smear at Dictionary.com
Old English smerian "to anoint or rub with grease, oil, etc.," from Proto-Germanic *smerthan (cf. Old Norse smyrva, Danish smøre, Swedish smörja, Dutch smeren, Old High German smirwen, German schmieren "to smear"), from PIE *smeru- "grease" (cf. Greek myron "unguent, balsam," Old Irish smi(u)r "marrow," Old English smeoru "fat, grease"). Sense of "assault a public reputation with unsubstantiated charges" is from 1879. Related: Smeared; smearing.