ache

n.疼 vi.疼痛，持续的隐隐作痛

accurately, accursed, accusation, accusative, accusatory, accuse, accuse sb. of sth., accused, accused of, accuser, accusingly, accustom, accustomed, accustomed to, ace, acerbic, acerbity, acetate, acetone, acetylene, achievable, achieve, achieve one's goals, achievement, achiever, Achilles, Achilles' tendon, aching, achromatic, achy, acid, acid rain, acidic, acidify, acidity, acidly, acidosis, acidulated, acidulous, acknowledge,