fail >> /feɪl/
Definition: [intransitive verb] Be unsuccessful in achieving one's goal.
Example: he failed in his attempt to secure election
Definition: [intransitive verb] Neglect to do something.
Example: the firm failed to give adequate risk warnings
Definition: [intransitive verb] Break down; cease to work well.
Example: a truck whose brakes had failed
Definition: [noun] A grade that is not high enough to pass an examination or test.
Example: It is feared that their children will be given an automatic fail mark because the number of days they study at school falls far short of the minimum set by the education authorities.