insincere
Americanadjective
adjective
Other Word Forms
Etymology
Origin of insincere
1625–35; < Latin insincērus tainted, dishonest; see in- 3, sincere
Explanation
Someone who's insincere is a little bit fake or phony. Your classmate's insincere apology for interrupting you probably sounds like she doesn't really mean it. When you're insincere, you're not being completely honest. A losing politician often gives an insincere-sounding concession speech, and a teacher who's having a terrible day might wear an insincere smile on her face. The adjective sincere, "coming from genuine, honest feelings," is at the root of insincere — the Latin prefix in, or "not," is combined with sincerus, "sound, pure, or whole."
Vocabulary lists containing insincere
The New SAT: Words to Capture Tone
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The SAT: Words to Capture Tone, List 6
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ACT Reading Test: Words to Capture Tone, List 4
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
"All those things may be insincere or dishonest in their own ways, but at least there's something," he said.
From Barron's ● Jul. 10, 2026
But in a setting that demands connection, he can appear condescending or insincere.
From Salon ● Jun. 17, 2026
A federal jury in Los Angeles found that Left defrauded other investors with insincere opinions designed to move stock prices in his favor.
From The Wall Street Journal ● Jun. 2, 2026
Peppering in phrases like “love bombing” and “disassociative” feels insincere.
From Los Angeles Times ● Oct. 30, 2025
Powell groaned heavily behind a noticeably insincere smile.
From "I, Robot" by Isaac Asimov
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Get a wordDefinitions 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.
