Word for people who are not on good terms with someone

Incompatible, hostile, aversion and at odds.

Mutual loathing, mutual aversion. Having a mutually averse relationship.

Having hostile aversion towards each other.

Being mutually antipathetic. Antipathetic towards each other: http://www.thefreedictionary.com/antipathetic

an·tip·a·thet·ic (n-tp-thtk) also an·tip·a·thet·i·cal (--kl)

adj.
  1. Having or showing a strong aversion or repugnance: antipathetic to new ideas.
  2. Opposed in nature or character; antagonistic: antipathetic factions within the party.

Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003

Causing a feeling of antipathy; repugnant:
  1. antipathetic - (usually followed by `to') strongly opposed; "antipathetic to new ideas"; "averse to taking risks"; "loath to go on such short notice"; "clearly indisposed to grant their request"
  2. antipathetic - characterized by antagonism or antipathy; "slaves antagonistic to their masters"; "antipathetic factions within the party"

Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


persona non grata comes to mind:

persona non grata Latin [pɜːˈsəʊnə nɒn ˈgrɑːtə]

n pl personae non gratae [pɜːˈsəʊniː nɒn ˈgrɑːtiː]

  1. an unacceptable or unwelcome person

  2. (Government, Politics & Diplomacy) a diplomatic or consular officer who is not acceptable to the government or sovereign to whom he or she is accredited

From the FreeDictionary.com