必需|ひつじゅhitsuju[0]heiban (flat)

1. no-adjectivenecessary

• Synonym必要ひつようNeutralThe most common, general word for 'necessary' or 'needed'; 「必需」 is narrower, for things you cannot do without in daily life, as in 「必需品」.
• Synonym必須ひっすNeutralIndispensable or required, as in 「必須科目」; stresses conditions and requirements rather than daily necessities.
• Synonym不可欠ふかけつNeutralIndispensable, as in 「〜に不可欠だ」; stresses that something simply cannot be done without.
• Antonym不要ふようNeutralNot needed; the direct opposite of 「必需」.
• Antonym無用むようNeutralUseless or unnecessary, also seen in prohibitions like 「立入無用」; the opposite of 「必需」.

Use 「必需」 for things you cannot do without in daily life, mostly in 「必需品」. For general need pick 「必要」, for required conditions 「必須」, for indispensable 「不可欠」; the opposite is 「不要」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. どうしても必要ひつようなこと。