"strengthen up" meaning in English

{
  "forms": [
    {
      "form": "strengthens up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "strengthening up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "strengthened up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "strengthened up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "strengthen up (third-person singular simple present strengthens up, present participle strengthening up, simple past and past participle strengthened up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English phrasal verbs formed with \"up\"",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "To become or make (something) stronger, tougher or more durable."
      ],
      "id": "en-strengthen_up-en-verb-qXNOa~jG",
      "raw_glosses": [
        "(transitive, intransitive) To become or make (something) stronger, tougher or more durable."
      ],
      "tags": [
        "intransitive",
        "transitive"
      ]
    }
  ],
  "word": "strengthen up"
}

{
  "forms": [
    {
      "form": "strengthens up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "strengthening up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "strengthened up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "strengthened up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "strengthen up (third-person singular simple present strengthens up, present participle strengthening up, simple past and past participle strengthened up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English intransitive verbs",
        "English lemmas",
        "English multiword terms",
        "English phrasal verbs",
        "English phrasal verbs formed with \"up\"",
        "English transitive verbs",
        "English verbs",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "To become or make (something) stronger, tougher or more durable."
      ],
      "raw_glosses": [
        "(transitive, intransitive) To become or make (something) stronger, tougher or more durable."
      ],
      "tags": [
        "intransitive",
        "transitive"
      ]
    }
  ],
  "word": "strengthen up"
}