"昔取った杵柄" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 成句",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語_ことわざ",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "むかしとったきねづか"
    },
    {
      "form": "昔とった杵柄",
      "tags": [
        "alternative"
      ]
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "過去に覚えた技能が現在でも衰えていないこと。"
      ],
      "id": "ja-昔取った杵柄-ja-phrase-TOC6cEf8"
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "昔取った杵柄"
}

{
  "categories": [
    "日本語",
    "日本語 成句",
    "日本語_ことわざ"
  ],
  "forms": [
    {
      "form": "むかしとったきねづか"
    },
    {
      "form": "昔とった杵柄",
      "tags": [
        "alternative"
      ]
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "過去に覚えた技能が現在でも衰えていないこと。"
      ]
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "昔取った杵柄"
}