simple past tense and past participle of fail

unsuccessful / Decayed; worn out. / Bankrupt.

plural of failing

(intransitive) To be unsuccessful. / (transitive) Not to achieve a particular stated goal. (Usage note: The direct object of this word is usually an infinitive.) / (transitive) To neglect.

(uncountable, slang) Poor quality; substandard workmanship. / (slang) A failure (condition of being unsuccessful) / (slang, US) A failure (something incapable of success)

(slang, US) Unsuccessful; inadequate; unacceptable in some way.

A piece of turf cut from grassland.

present participle of fail

weakness; defect

If what follows is not possible; without.