Adverb
Without sincerity.
Source: Webster's dictionaryFlattery is praise insincerely given for an interested purpose. Henry Ward Beecher
she congratulated him somewhat insincerely Source: Internet
Although Bletch is physically disgusted by Heidi, he insincerely comforts her since he needs her talent on the show. Source: Internet
Burying Burying is a type of tactical voting in which a voter insincerely ranks an alternative lower in the hopes of defeating it. Source: Internet
Types Compromising Compromising (sometimes "useful vote") is a type of tactical voting in which a voter insincerely ranks an alternative higher in the hope of getting it elected. Source: Internet