smooth

Synonyms: bland continuous creamy easy effortless equable even flat fluent fluid flush frictionless gentle glassy glossy hairless horizontal invariable lustrous mild mirrorlike monotonous peaceful plain planate plane polished quiet regular rhythmic rippleless serene shaven shiny silky sleek soft soothing stable steady still tranquil unbroken undeviating undisturbed uneventful uniform uninterrupted unruffled untroubled unvarying velvety

Antonyms: broken coarse intermittent irregular rough uneven wrinkled

Synonyms: agreeable bland civilized courteous courtly facile genial glib ingratiating mellow mild persuasive pleasant polite slick smarmy unctuous urbane

Antonyms: coarse rough uncool

Synonyms: burnish clear even flatten flush glaze gloss grade iron lay level make uniform perfect plane polish press refine round sand sleek slick varnish

Antonyms: coarsen roughen wrinkle

Synonyms: allay alleviate appease assuage calm comfort cool ease extenuate facilitate iron out mellow mitigate mollify palliate pat pave the way soften stroke take the edge off take the sting out

Antonyms: aggravate agitate incite irritate upset