noun a continuous or prolonged dull pain in a part of one's body
verb to suffer from a continuous or prolonged dull pain
noun a facial expression usually of disgust, disapproval, or pain
verb to make a facial expression usually of disgust, disapproval, or pain
verb A verb is a word that expresses an action or a state of being. In this case, 'ached' is a verb that describes a feeling of pain or discomfort.