What would you call a person who is friendly on the outside but from the inside is plotting something against the one he is acting nice to? [duplicate]
When I type this question in the Google it shows the name of some disease...and I don't want that...I am looking for a word that can discribe him...if not then atleast some adjective to receive his personality, e.g- cunning
Treacherous is what comes to mind first. But also devious, two-faced, passive-agressive, Depending in degree and context. I’m sure there are more. Take those words and check a Thesarus for more based on those words, if you need others.