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| 緊要 news2 nf38; 入用 (いりよう); 必携 news2 nf43 spec2; 必須 ichi1 news1 nf20; 必要 ichi1 news1 nf01 (ひつよう); 不可欠 ichi1 news1 nf07; 必要不可欠; 必用 必用 can imply has to be used rather than is just needed; 不可欠 | |||
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| 欠かせない | |||
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| 必携 news2 nf43 spec2 | |||
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| 欠くべからざる | |||
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Unentbehrliches : 1 phrase in 1 subject |
| General | 1 |