"不退転" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "examples": [
        {
          "bold_text_offsets": [
            [
              0,
              3
            ]
          ],
          "ref": "（坂口安吾『勉強記』）",
          "text": "不退転の決意をもって巴里密航の旅費を累積しはじめた"
        }
      ],
      "glosses": [
        "屈しないこと。くじけないこと。"
      ],
      "id": "ja-不退転-ja-noun-ERDpSCUX"
    },
    {
      "glosses": [
        "行き着いてしまい、引き返せないこと。"
      ],
      "id": "ja-不退転-ja-noun-JKVh~N~d"
    }
  ],
  "synonyms": [
    {
      "word": "不屈"
    },
    {
      "word": "不撓"
    },
    {
      "word": "不撓不屈"
    },
    {
      "word": "不抜"
    },
    {
      "word": "強固"
    },
    {
      "word": "確固"
    },
    {
      "word": "気概"
    },
    {
      "word": "剛毅"
    },
    {
      "word": "豪毅"
    }
  ],
  "translations": [
    {
      "lang": "英語",
      "lang_code": "en",
      "word": "indomitable"
    },
    {
      "lang": "中国語",
      "lang_code": "zh",
      "word": "不屈"
    }
  ],
  "word": "不退転"
}

{
  "categories": [
    "日本語",
    "日本語 名詞"
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "senses": [
    {
      "examples": [
        {
          "bold_text_offsets": [
            [
              0,
              3
            ]
          ],
          "ref": "（坂口安吾『勉強記』）",
          "text": "不退転の決意をもって巴里密航の旅費を累積しはじめた"
        }
      ],
      "glosses": [
        "屈しないこと。くじけないこと。"
      ]
    },
    {
      "glosses": [
        "行き着いてしまい、引き返せないこと。"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "不屈"
    },
    {
      "word": "不撓"
    },
    {
      "word": "不撓不屈"
    },
    {
      "word": "不抜"
    },
    {
      "word": "強固"
    },
    {
      "word": "確固"
    },
    {
      "word": "気概"
    },
    {
      "word": "剛毅"
    },
    {
      "word": "豪毅"
    }
  ],
  "translations": [
    {
      "lang": "英語",
      "lang_code": "en",
      "word": "indomitable"
    },
    {
      "lang": "中国語",
      "lang_code": "zh",
      "word": "不屈"
    }
  ],
  "word": "不退転"
}