verb
fails; failed; failing
to not succeed :to end without success [no obj]
followed by to + verb
[no obj] :to not succeed as a business :to become bankrupt
[+ obj] :to not do (something that you should do or are expected to do) - followed by to + verb
to not do something [+ obj]
followed by to + verb
[+ obj] :to not do or provide something that is needed by (someone)
to be unsuccessful in passing (an examination, a course of study, etc.) [+ obj]
[+ obj] :to decide that (someone) has not passed an examination or course of study
[no obj]
to stop working
to lose strength :to become weak or weaker
noun
without fail
used to stress that something always happens
used to stress that something will definitely happen