Treacherous

[Sarah]

Like a traitor; involving treachery; violating allegiance orfaith pledged; traitorous to the state or sovereign; perfidious inprivate life; betraying a trust; faithless.Loyal father of a treacherous son. Shak.The treacherous smile, a mask for secret hate. Cowper.

[Sarah]

likely to betray trust; unreliable; marked by hidden dangers, hazards, or perils
A word overused by nearly every television and radio news-anchor to describe conditions of every flat surface during cold-weather situations.

[Sarah]

meaning something is amazing or great

[Becky]

[Treacherous] is a person that you cannot trust and they are disloyal. Treacherous is a person that lies, cheats, steals and kills. [treacherous] person is when they betray there friends and allies. and they talk bad about a person and another person. and sometimes that thing can be said true but sometimes its not right to say it. Treacherous people can be [faithless], disrespectful and aggressive mostly. they will [backbite] you and attack you out of nowhere. be careful who you trust.

[Mark Zuckerberg]

betraying or likely to betray faith or confidence. 2. unstable, [unreliable], or dangerous. 3. guilty of or involving [betrayal] or deception, 4.capable of convincing other love interests or fuckbuddys that a former [beau] is guilty of saying and doing anything she likes that will cause them to be beaten constantly and socially outcast without any proof or remorse: treacherous weather, treacherous ground, treacherous woman, treacherous slut, treacherous cunt.... unstable unreliable,dangerous,fuckbuddys,cunt.

[Rihanna]

Guilty of or involving betrayal or deception.

[Agnes]

If the ground or sea is treacherous, it is extremely dangerous, especially because of bad weather conditions: