Antonyms for break ice

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

EXAMPLES FROM THE WEB FOR BREAK ICE

Every morning I bathed in the ocean, even if I had to break ice to find water, and then I rolled in the snow.

You may break ice by force into a thousand pieces,—it is ice still; but expose it to the warm sun, and behold!