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Etymology
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Verb

 * 1)  to bite one's tongue, bite one's lip to forcibly prevent oneself from speaking in order to avoid saying something inappropriate or likely to cause a dispute
 * 1)  to bite one's tongue, bite one's lip to forcibly prevent oneself from speaking in order to avoid saying something inappropriate or likely to cause a dispute
 * 1)  to bite one's tongue, bite one's lip to forcibly prevent oneself from speaking in order to avoid saying something inappropriate or likely to cause a dispute