"κτυπώ" meaning in Greek

{
  "forms": [
    {
      "form": "ktypó",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "κτύπησα",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "verbs",
        "head": "",
        "sort": "",
        "ts": ""
      },
      "expansion": "κτυπώ • (ktypó)",
      "name": "head"
    },
    {
      "args": {
        "past": "κτύπησα"
      },
      "expansion": "κτυπώ • (ktypó) (past κτύπησα)",
      "name": "el-verb"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "chtypáo",
          "word": "χτυπάω"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of χτυπάω (chtypáo)"
      ],
      "id": "en-κτυπώ-el-verb-KmWuACmT",
      "links": [
        [
          "χτυπάω",
          "χτυπάω#Greek"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "κτυπώ"
}

{
  "forms": [
    {
      "form": "ktypó",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "κτύπησα",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "verbs",
        "head": "",
        "sort": "",
        "ts": ""
      },
      "expansion": "κτυπώ • (ktypó)",
      "name": "head"
    },
    {
      "args": {
        "past": "κτύπησα"
      },
      "expansion": "κτυπώ • (ktypó) (past κτύπησα)",
      "name": "el-verb"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "chtypáo",
          "word": "χτυπάω"
        }
      ],
      "categories": [
        "Greek entries with incorrect language header",
        "Greek lemmas",
        "Greek verbs",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Alternative form of χτυπάω (chtypáo)"
      ],
      "links": [
        [
          "χτυπάω",
          "χτυπάω#Greek"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "κτυπώ"
}