Necessary /(?)/

1. Such as must be; impossible to be otherwise; not to be avoided; inevitable.

   Death, a necessary end, Will come when it will come.

2. Impossible to be otherwise, or to be dispensed with, without preventing the attainment of a desired result; indispensable; requisite; essential.

   A certain kind of temper is necessary to the pleasure and quiet of our minds.

3. Acting from necessity or compulsion; involuntary; -- opposed to free; as, whether man is a necessary or a free agent is a question much discussed.

pl. Necessaries

1. A thing that is necessary or indispensable to some purpose; something that one can not do without; a requisite; an essential; -- used chiefly in the plural; as, the necessaries of life.
2. A privy; a water-closet.
3. Such things, in respect to infants, lunatics, and married women, as are requisite for support suitable to station. (Law)