Failing
Part of speech: verb
Definition: To be unsuccessful.
Part of speech: noun
Definition: Weakness; defect
Part of speech: preposition
Definition: if the preferred or prior option is not possible
Example sentence: By failing to prepare, you are preparing to fail.
Unsuccessful
Part of speech: adjective
Definition: Failed, not successful.
Example sentence: At that time, the people that were in the animated film business were mostly guys who were unsuccessful newspaper cartoonists. In other words, their ability to draw living things was practically nil.