nec·es·sary /ˈnɛsəˌsɛri/
 (a.)必須的,需要的,必然的,不可缺少的必需品


 necessary
 必要


 Nec·es·sa·ry a.
 1. Such as must be; impossible to be otherwise; not to be avoided; inevitable.
 Death, a necessary end,
 Will come when it will come.   --Shak.
 2. Impossible to be otherwise, or to be dispensed with, without preventing the attainment of a desired result; indispensable; requisite; essential. “'T is necessary he should die.”
    A certain kind of temper is necessary to the pleasure and quiet of our minds.   --Tillotson.
 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.


 Nec·es·sa·ry, n.; 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. pl. Law Such things, in respect to infants, lunatics, and married women, as are requisite for support suitable to station.

 ◄ ►


 necessary
      adj 1: absolutely essential [ant: unnecessary]
      2: unavoidably determined by prior circumstances; "the
         necessary consequences of one's actions"
      n : anything indispensable; "food and shelter are necessities of
          life"; "the essentials of the good life"; "allow farmers
          to buy their requirements under favorable conditions"; "a
          place where the requisites of water fuel and fodder can
          be obtained" [syn: necessity, essential, requirement,
           requisite] [ant: inessential]