necessary
英 ['nesəs(ə)rɪ]
美['nɛsəsɛri]
	    - adj. 必要的;必需的;必然的
 - n. 必需品
 - n. (Necessary)人名;(英)内塞瑟里
 
英英释意
- 1. 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"