"tk" meaning in English

{
  "etymology_text": "Abbreviation of to come. C is replaced with K because -tk- occurs much less often in English than -tc-, making it easier to search for in a text.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "tk (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mass media",
          "orig": "en:Mass media",
          "parents": [
            "Culture",
            "Media",
            "Society",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A placeholder used before publication for information that is not yet available but will be filled in before publication."
      ],
      "id": "en-tk-en-adj-OPxxdFHh",
      "links": [
        [
          "journalism",
          "journalism"
        ]
      ],
      "raw_glosses": [
        "(journalism) A placeholder used before publication for information that is not yet available but will be filled in before publication."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "journalism",
        "media"
      ],
      "wikipedia": [
        "To come (publishing)"
      ]
    }
  ],
  "word": "tk"
}

{
  "etymology_text": "Abbreviation of to come. C is replaced with K because -tk- occurs much less often in English than -tc-, making it easier to search for in a text.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "tk (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English uncomparable adjectives",
        "English words without vowels",
        "Pages with 3 entries",
        "Pages with entries",
        "en:Mass media"
      ],
      "glosses": [
        "A placeholder used before publication for information that is not yet available but will be filled in before publication."
      ],
      "links": [
        [
          "journalism",
          "journalism"
        ]
      ],
      "raw_glosses": [
        "(journalism) A placeholder used before publication for information that is not yet available but will be filled in before publication."
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "journalism",
        "media"
      ],
      "wikipedia": [
        "To come (publishing)"
      ]
    }
  ],
  "word": "tk"
}