Unsincere vs. Insincere

Unsincere and Insincere Definitions
Unsincere
Insincere
Insincere
Not sincere; not genuine
An insincere apology.
Unsincere
Not sincere or pure; insincere.
Insincere
Habitually phony or dishonest
Distrusted him as insincere.
Insincere
Not genuinely meaning what has been expressed; not sincere; artificial.
Janice's furious glare showed that her apology was insincere.
Insincere
Not being in truth what one appears to be; not sincere; dissembling; hypocritical; disingenuous; deceitful; false; - said of persons; also of speech, thought; etc.; as, insincere declarations.
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Insincere
Disappointing; imperfect; unsound.
To render sleep's soft blessings insincere.
Insincere
Lacking sincerity;
A charming but thoroughly insincere woman
Their praise was extravagant and insincere