Rules that exist in many languages that force some parts of a sentence to be used or inflected differently depending on certain attributes of other parts.
A legally binding contract enforceable in a court of law.
An understanding between entities to follow a specific course of conduct.
A state whereby several parties share a view or opinion; the state of not contradicting one another.
Revenge.
A bitter, destructive feud, normally between two families, clans, or factions, in which each injury or slaying is revenged: a blood feud.
A motivational grudge against a person or faction, which may or may not be reciprocated; the state of having it in for someone.