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.
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
Although multiple former Japanese leaders have offered their apologies and remorse, many South Koreans regard these sentiments as insincere or insufficient without formal acknowledgement.
From BBC • Aug. 4, 2025
That promise, insincere from the start, looks hollower every day.
From Slate • Jun. 16, 2025
"We are not going to bend in the face of this insincere outrage," Leavitt told reporters at the White House.
From Salon • Mar. 26, 2025
They had been halfhearted tokens of penance, insincere, corrupt gestures meant more for his own appeasement than hers.
From "A Thousand Splendid Suns" by Khaled Hosseini
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.
