啊 á : an interjection; to express doubt or to question; to show realization; to stress

Big5: , Unicode: 554a (啊),
Links: MT, Cantonese, Ld, Chinese Language

唉 «誒» āi : an interjection; to express realization or agreement (yes, oh, right, etc)

Big5: , Unicode: 5509 (唉),
Links: MT, Cantonese, Ld, Chinese Language

達 [达] dá : attain; pass through; achieve; reach; realize; clear; inform; notify; dignity

Big5: , Unicode: 9054 (達),
Links: MT, Cantonese, Ld, Chinese Language

明 白 míng bai : clear; obvious; unequivocal; to understand; to realize

實 現 shí xiàn : to achieve; to implement; to realize; to bring about

體 認 tǐ rèn : realization; realize