ETYM Old Eng. enemyte, from enemy: cf. French inimitié, Old Fren. enemistié. Related to Enemy, Amity.
1. The quality of being an enemy; hostile or unfriendly disposition.
2. A state of opposition; hostility.

ETYM Latin hostilitas: cf. French hostilité.
1. A hostile (very unfriendly) disposition; SYN. ill will.
2. A state of deep-seated ill-will; SYN. enmity, antagonism.
3. Acts of overt warfare; SYN. belligerency.
4. The feeling of a hostile person; SYN. enmity, ill will.

ETYM Written also rancour.
(Alternate spelling: rancour).
The deepest malignity or spite; deep-seated enmity or malice; inveterate hatred.

Alternate (chiefly British) spelling for rancor.