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1)
#246

Inflections of 必要

Common
Pitch accent
Meaning
  1. necessary; needed; essential; indispensable
    必用 can imply has to be used rather than is just needed
    We need food, clothes and a home in order to live.
  2. necessity; need; requirement
    You don't need to go to the dentist's.
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2)
#1,383

Inflections of 必要ない

Pitch accent
Meaning
  1. unnecessary; not needed; not necessary
    He doesn't need such treatment.
Forms
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Legend