painful

adjective [原级]疼痛的；引起疼痛的；令人痛苦（难受）的，困难的；<非正式>令人难堪的

Situations, memories, or experiences that are painful are difficult and unpleasant to deal with, and often make you feel sad and upset. ^{(情形、记忆或经历) 痛苦的}