Difference between Fails and Betray

FAILS vs BETRAY: NOUN

To divulge in a breach of confidence.
To make known unintentionally.
To be false or disloyal to.
To inform upon or deliver into the hands of an enemy in violation of a trust or allegiance.
To lead astray; deceive.
To deliver into the hands of an enemy by treachery or fraud, in violation of trust; to give up treacherously or faithlessly.
To prove faithless or treacherous to, as to a trust or one who trusts; to be false to; to deceive.
To violate the confidence of, by disclosing a secret, or that which one is bound in honor not to make known.
To disclose or discover, as something which prudence would conceal; to reveal unintentionally.
To give aid or information to an enemy of; commit treason against.
To mislead; to expose to inconvenience not foreseen to lead into error or sin.
To lead astray, as a maiden; to seduce (as under promise of marriage) and then abandon.
To show or to indicate; -- said of what is not obvious at first, or would otherwise be concealed.

To deliver to, or expose to the power of, an enemy by treachery or disloyalty: as, an officer betrayed the city.
To violate by fraud or unfaithfulness; be unfaithful in keeping or upholding: as, to betray a trust.
To act treacherously to; be disloyal to; disappoint the hopes or expectations of.
To deceive; beguile; mislead; seduce.
To reveal or disclose in violation of confidence; make known through breach of faith or obligation: as, to betray a person's secrets or designs.
To show in true character; allow to be seen; permit to appear in spite of will or desire.
To indicate; give indication or evidence of: said of something not obvious at first view, or that would otherwise be concealed.
Disappoint, prove undependable to
Abandon, forsake

Give way, Give out, Conk out, Flush it, Run out, Break down, Go wrong, Bomb, Break, Miscarry, Go, Betray, Neglect, Die, Flunk

Shop, Peach, Give away, Grass, Stag, Rat, Sell, Shit, Wander, Fail, Cuckold, Snitch, Denounce, Cheat, Deceive

Lacks, Failure, Does, Give way, Give out, Conk out, Break down, Go wrong, Bomb, Break, Miscarry, Betray, Neglect, Die, Flunk

Lead astray, Shop, Peach, Give away, Grass, Stag, Rat, Sell, Shit, Wander, Cuckold, Snitch, Denounce, Cheat, Deceive

Bank can sell if he fails to repay.
Depends on what happens when the application fails.
It fails to meet our standards of usability.
What Happens in Canada if a Bank Fails?
Frontier fails to reasonably create and maintain records.
If this property is specified, the query fails.
This message is displayed when Document save fails.
The loan will be in default if the borrower fails to maintain required fire or flood insurance or fails to pay property taxes.
If writing to the WAL fails, the entire operation to modify the data fails.
Many courts consider that if the other case fails, the ED case automatically fails.

Twelve, because he was going to betray Him.
Those whom I trusted did my trust betray.
Randolph, striving not to betray too much interest.
Judas do you betray me with a kiss?
British might eventually betray them within the island.
It allowed me the time to betray him.
Did Judas make a choice to betray Christ?
To betray a friend will seem to the moral bureaucrat less serious than to betray a legal partner.
Then Cavendish shoots Collins in the back, reasoning that someone who would betray the Rangers could also betray his gang.
How can you have characters betray each other or betray their own visions?