The quality or state of being necessary, unavoidable, or
absolutely requisite; inevitableness; indispensableness.

The condition of being needy or necessitous; pressing
need; indigence; want.

That which is necessary; a necessary; a requisite;
something indispensable; – often in the plural.

That which makes an act or an event unavoidable;
irresistible force; overruling power; compulsion, physical or moral;
fate; fatality.

The negation of freedom in voluntary action; the
subjection of all phenomena, whether material or spiritual, to
inevitable causation; necessitarianism.