insincere

[ in-sin-seer ]

/ ˌɪn sɪnˈsɪər /

not sincere; not honest in the expression of actual feeling; hypocritical.

Origin of insincere

1625–35; < Latin insincērus tainted, dishonest; see in-³, sincere

in·sin·cere·ly, adverb

McCain called Cruz a “wacko bird” and later took it back, about as insincerely as possible.

Why the GOP Needs a Return to the Bush Leagues |Robert Shrum |April 21, 2014 |DAILY BEAST
"Fortunately it doesn't matter, as Julian is late too," said Mrs. Maldon insincerely, for it was mattering very much.

The Price of Love |Arnold Bennett
"You—you'll have to have patience," Henley remarked, insincerely.

Dixie Hart |Will N. Harben
She begged permission, either sincerely or insincerely, to retire to the convent of Port Royal.

Louis XIV., Makers of History Series |John S. C. Abbott

There are those who, sincerely or insincerely, still cling to State action as a theoretical hope.

State of the Union Addresses of Franklin D. Roosevelt |Franklin D. Roosevelt
But Pan Stanislav said this insincerely, for the thought that some other man might take her was tremendously bitter for him.

Children of the Soil |Henryk Sienkiewicz

insincere

/ (ˌɪnsɪnˈsɪə) /

lacking sincerity; hypocritical

insincerely, adverb insincerity (ˌɪnsɪnˈsɛrɪtɪ), noun