“fail”

To do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence.

Physically secure and certain, non-failing, reliable.

To fail to hit, catch, grasp, etc.

Upon failure, it is easier to blame the tools used rather than how they were employed.

A failure remains a failure, regardless of how close to success one has actually come.

To shirk, avoid, or fail to fulfill (a task, responsibility, etc.)