rest assured

Idioms & Phrases

rest assured

You can be sure, as in Rest assured that the police will recover your diamonds. This expression uses assured in the sense of "certain" or "confident," a usage dating from the early 1500s.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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00:10
Rest assured is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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