Irreconcilable
Part of speech: adjective
Definition: Unable to be reconciled; opposed; uncompromising.
Hostile
Part of speech: noun
Definition: An enemy; esp., an American Indian in arms against the whites; -- commonly in the plural.
Part of speech: adjective
Definition: Belonging or appropriate to an enemy; showing the disposition of an enemy; showing ill will and malevolence, or a desire to thwart and injure; occupied by an enemy or enemies; inimical; unfriendly
Example sentence: The secret of happiness is this: let your interests be as wide as possible, and let your reactions to the things and persons that interest you be as far as possible friendly rather than hostile.