levigate

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To make into a smooth, fine powder or paste, as by grinding when moist.
2. v. To separate fine particles from coarse by grinding in water.
3. v. To suspend in a liquid.
4. v. To make smooth; polish.
5. adj. Smooth.

Century Dictionary and Cyclopedia

1. To rub or grind to a fine impalpable powder, as in a mortar. See levigation.
2. To plane; polish; make smooth.
3. Smooth as if polished; having a polished surface: applied in botany to leaves, seeds, etc. Also lævigate.
4. To lighten; make light of; belittle the importance of.
5. Lightened; alleviated.

Wiktionary

1. v. To make smooth.

GNU Webster's 1913

1. adj. Made less harsh or burdensome; alleviated.
2. v. To free from grit; to reduce to an impalpable powder or paste.
3. v. To mix thoroughly, as liquids or semiliquids.
4. v. To polish.
5. v. To make smooth in action.
6. v. Technically, to make smooth by rubbing in a moist condition between hard surfaces, as in grinding pigments.
7. adj. Made smooth, as if polished.