FAILING

To be unsuccessful.

"Throughout my life, I have always failed."

Not to achieve a particular stated goal. (Usage note: The direct object of this word is usually an infinitive.)

"The truck failed to start."

To neglect.

"The report fails to take into account all the mitigating factors."

Weakness; defect

"His worst failing is his temper."

If the preferred or prior option is not possible

"A large proportion of the females employed in other firms are said to have signified their intention of going on strike, failing a settlement."