necessary

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

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 (for: essential)
• Derivationally related forms:
requisite (for: requisite), require (for: requirement), essential (for: essential), necessitous (for: necessity), necessary (for: necessity), necessitate (for: necessity)
• Hypernyms:
thing
• Hyponyms:
desideratum, must, need, want

II - adjective

1. absolutely essential (Freq. 81)
• Ant:
unnecessary
• Similar to:
essential, indispensable, incumbent, needed, needful,
required, requisite, obligatory
• See Also:
essential, indispensable, obligatory
• Derivationally related forms:
necessity
• Attrubites:
necessity
2. unavoidably determined by prior circumstances (Freq. 1)
- the necessary consequences of one's actions
• Similar to:
inevitable

• Từ đồng nghĩa / Synonyms:
  necessity, essential, requirement, requisite
• Từ trái nghĩa / Antonyms:
  unnecessary, unneeded, inessential, nonessential