Noun
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.
Source: Webster's dictionaryNecessity makes even the timid brave. Sallust
Nothing has more strength than dire necessity. Euripides
If bread is the first necessity of life, recreation is a close second. Edward Bellamy
Necessity changes a lion into a fox. Persian Proverb
Necessity is the mother of invention. English Proverb
Necessity turns lion into fox. Persian Proverb