Etymology of otsu

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

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        "1": "en",
        "2": ":bor",
        "3": "ja:乙<t:second>",
        "text": "+",
        "tree": "1"
      },
      "expansion": "[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"gloss\" : \"second\", \"children\" : [ ], \"lang_name\" : \"Japanese\", \"term\" : \"乙\", \"status\" : \"missing\", \"lang\" : \"ja\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"English\", \"term\" : \"otsu\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"otsu\">\nBorrowed from Japanese 乙 (“second”)."
    },
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        "2": ":bor",
        "3": "ja:乙<t:second>",
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      "expansion": "Borrowed from Japanese 乙 (“second”)."
    }
  ],
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    [
      "乙",
      "乙#Japanese"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "adj",
      "glosses": [
        "In Old Japanese, one of two sets of vowels of uncertain pronunciation which fell together in modern Japanese."
      ],
      "tags": [
        "not-comparable"
      ],
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