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keep a civil tongue in one's head
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Idioms and Phrases
Speak politely, as in The teacher won't allow swearing; she says we must keep a civil tongue in our heads . This expression uses tongue in the sense of “a manner of speaking,” a usage dating from the 1400s. An early cautionary version was “Keep a good tongue in your head, lest it hurt your teeth” (1595).Advertisement
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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