insincere

insincere adjective uk/ˌɪnsɪnˈsɪər/ us
pretending to feel something that you do not really feel, or not meaning what you say

неискренний
an insincere apology insincere ly adverb

неискренне
insincerity noun [ U ] uk/ˌɪnsɪnˈserəti/ us

неискренность