Focus on the pronunciation of fail
English definition of “fail”
/feɪl/ v [I] (STOP)
› to become weaker or stop working completely: The bus driver said the brakes failed. › If a business fails, it is unable to continue because of money problems. failing
/ˈfeɪ·lɪŋ/ adj [not gradable] › He is in failing health and seldom goes outside any more.