sincere/sInˋsIr; sInˈsIə/adj honest and really meaning what you say [ insincere ] 由衷的﹐真诚的﹐真心实意的: sincere thanks/apology/sympathy etc Please accept my sincere apologies. 请接受我真诚的歉意。a sincere and loyal friend 真挚忠实的朋友 —sincerity /sInˋsɛrətI; sInˈserəti or sInˈserIti/n [U]