can't bring oneself toOften expresses being unable or unwilling to do something; with verbs such as กิน (eat), it can mean being unable to eat or having no appetite. Its meaning depends on the verb and context.
TH: เห็นเขาลำบากแล้วฉันทำร้ายเขาไม่ลง
EN: Seeing him struggle, I can't bring myself to hurt him.