Courage to carry on is a phrase that is often used to describe the strength and determination of an individual to continue in the face of adversity. The two crossword solutions for this phrase are NERVE (5 letters) and METTLE (6 letters). NERVE is defined as the ability to face danger or pain without flinching, while METTLE is defined as courage and fortitude in the face of difficulty. Both words can be used to describe the courage and determination needed to carry on in difficult times.