"ねば" meaning in Japonais

{
  "categories": [
    {
      "kind": "other",
      "name": "Suffixes en japonais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Japonais",
      "orig": "japonais",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "neba",
      "tags": [
        "transcription"
      ]
    }
  ],
  "lang": "Japonais",
  "lang_code": "ja",
  "pos": "suffix",
  "pos_title": "Suffixe",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Termes archaïques en japonais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Si … pas."
      ],
      "id": "fr-ねば-ja-suffix-S42-WNmH",
      "raw_tags": [
        "Attaché à un verbe"
      ],
      "tags": [
        "archaic"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en japonais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Termes littéraires en japonais",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "roman": "Mō ikaneba.",
          "text": "もう行かねば。",
          "translation": "Je dois partir maintenant."
        }
      ],
      "glosses": [
        "Devoir."
      ],
      "id": "fr-ねば-ja-suffix-aoJOHTop",
      "raw_tags": [
        "Attaché à un verbe"
      ],
      "tags": [
        "literary"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ne.ba\\"
    }
  ],
  "synonyms": [
    {
      "word": "ないと"
    },
    {
      "word": "ないといけない"
    },
    {
      "word": "なきゃ"
    },
    {
      "word": "なくちゃ"
    },
    {
      "word": "なくては"
    },
    {
      "word": "なければ"
    },
    {
      "word": "なければならない"
    },
    {
      "word": "ねばならない"
    }
  ],
  "tags": [
    "morpheme"
  ],
  "word": "ねば"
}

{
  "categories": [
    "Suffixes en japonais",
    "japonais"
  ],
  "forms": [
    {
      "form": "neba",
      "tags": [
        "transcription"
      ]
    }
  ],
  "lang": "Japonais",
  "lang_code": "ja",
  "pos": "suffix",
  "pos_title": "Suffixe",
  "senses": [
    {
      "categories": [
        "Termes archaïques en japonais"
      ],
      "glosses": [
        "Si … pas."
      ],
      "raw_tags": [
        "Attaché à un verbe"
      ],
      "tags": [
        "archaic"
      ]
    },
    {
      "categories": [
        "Exemples en japonais",
        "Termes littéraires en japonais"
      ],
      "examples": [
        {
          "roman": "Mō ikaneba.",
          "text": "もう行かねば。",
          "translation": "Je dois partir maintenant."
        }
      ],
      "glosses": [
        "Devoir."
      ],
      "raw_tags": [
        "Attaché à un verbe"
      ],
      "tags": [
        "literary"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ne.ba\\"
    }
  ],
  "synonyms": [
    {
      "word": "ないと"
    },
    {
      "word": "ないといけない"
    },
    {
      "word": "なきゃ"
    },
    {
      "word": "なくちゃ"
    },
    {
      "word": "なくては"
    },
    {
      "word": "なければ"
    },
    {
      "word": "なければならない"
    },
    {
      "word": "ねばならない"
    }
  ],
  "tags": [
    "morpheme"
  ],
  "word": "ねば"
}