"-ko-" meaning in Finnish

{
  "etymology_templates": [
    {
      "args": {
        "1": "fi",
        "2": "urj-fin-pro",
        "3": "*-ko-"
      },
      "expansion": "Proto-Finnic *-ko-",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Finnic *-ko-.",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "interfix"
      },
      "expansion": "-ko-",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "interfix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Finnish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Finnish interfixes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Finnish links with redundant target parameters",
          "parents": [
            "Links with redundant target parameters",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "laulaa (“he/she sings”) + -ko- → laulakoon (“may he/she sing”)"
        },
        {
          "text": "hankkii (“he/she acquires”) + -ko- → hankkikoon (“may he/she acquire”)"
        }
      ],
      "glosses": [
        "Marker of imperative mood in verbs in the third person, first-person plural and second-person plural."
      ],
      "id": "en--ko--fi-interfix-zo2JiGDN",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ko-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fi",
        "2": "urj-fin-pro",
        "3": "*-ko-"
      },
      "expansion": "Proto-Finnic *-ko-",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Finnic *-ko-.",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "interfix"
      },
      "expansion": "-ko-",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "interfix",
  "senses": [
    {
      "categories": [
        "Finnish entries with incorrect language header",
        "Finnish interfixes",
        "Finnish lemmas",
        "Finnish links with redundant target parameters",
        "Finnish terms derived from Proto-Finnic",
        "Finnish terms inherited from Proto-Finnic"
      ],
      "examples": [
        {
          "text": "laulaa (“he/she sings”) + -ko- → laulakoon (“may he/she sing”)"
        },
        {
          "text": "hankkii (“he/she acquires”) + -ko- → hankkikoon (“may he/she acquire”)"
        }
      ],
      "glosses": [
        "Marker of imperative mood in verbs in the third person, first-person plural and second-person plural."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ko-"
}