Answer: levigate

AnswerCrossword Clue
LEVIGATEMake smooth by polishing.
levigateto reduce to a fine powder
levigateto make a homogeneous mixture of, as gels
levigatehaving a smooth, glossy surface; glabrous
levigateto rub, grind, or reduce to a fine powder.
levigateto rub, grind, or reduce to a fine powder, as in a mortar, with or without the addition of a liquid