Oxford Dictionary English insincere adjectiveadjective BrE BrE//ˌɪnsɪnˈsɪə(r)// ; NAmE NAmE//ˌɪnsɪnˈsɪr// (disapproving) Add to my wordlistjump to other resultssaying or doing something that you do not really mean or believe an insincere smile opposite sincere Word Originmid 17th cent.: from Latin insincerus, from in- ‘not’ + sincerus ‘sincere’.See insincere in the Oxford Advanced American DictionaryCheck pronunciation: insincere oxfordlearnersdictionaries.com
