trauma
【创伤】
Brushing too hard, especially with a firmer-bristled brush, can cause trauma to the gums.
刷牙太用力，尤其是用更硬的毛刷，会对牙龈造成创伤。
He confronted his childhood traumaand tried to exorcise the pain.
他正视自己儿时所受的创伤，努力消除心中的痛苦。