"-isi-" meaning in Finnish

{
  "etymology_templates": [
    {
      "args": {
        "1": "fi",
        "2": "urj-fin-pro",
        "3": "*-ici-"
      },
      "expansion": "Proto-Finnic *-ici-",
      "name": "inh"
    },
    {
      "args": {
        "1": "krl",
        "2": "-si-"
      },
      "expansion": "Karelian -si-",
      "name": "cog"
    },
    {
      "args": {
        "1": "vep",
        "2": "-isi-"
      },
      "expansion": "Veps -isi-",
      "name": "cog"
    },
    {
      "args": {
        "1": "fi",
        "2": "fiu-pro",
        "3": "*-ńće",
        "4": "*-ńće-j"
      },
      "expansion": "Proto-Finno-Ugric *-ńće-j",
      "name": "inh"
    },
    {
      "args": {
        "1": "urj-pro",
        "2": "*-ńśe",
        "3": "*-nśe-j"
      },
      "expansion": "*-nśe-j",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-ita",
        "id": "valita"
      },
      "expansion": "-ita",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "",
        "3": "-itse-"
      },
      "expansion": "-itse-",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-inen",
        "3": "-ise-"
      },
      "expansion": "-ise-",
      "name": "m"
    },
    {
      "args": {
        "1": "urj-fin-pro",
        "2": "*-inën"
      },
      "expansion": "*-inën",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-ia",
        "id": "verbal"
      },
      "expansion": "-ia",
      "name": "m"
    }
  ],
  "etymology_text": "From Proto-Finnic *-ici- (related to Karelian -si- and Veps -isi-), from Proto-Finno-Ugric *-ńće-j, *-nśe-j; derived from the same ending as in -ita (stem -itse-), and probably also the diminutive ending -ise- (see *-inën) + the same ending as in -ia.",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "interfix"
      },
      "expansion": "-isi-",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "interfix",
  "senses": [
    {
      "categories": [
        {
          "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": "voi (“he can”) + -isi- → voisi (“he could”)"
        },
        {
          "text": "katson (“I watch”) + -isi- → katsoisin (“I would watch”)"
        }
      ],
      "glosses": [
        "Marker of conditional mood in verbs."
      ],
      "id": "en--isi--fi-interfix-Tpheed~C",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-isi-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fi",
        "2": "urj-fin-pro",
        "3": "*-ici-"
      },
      "expansion": "Proto-Finnic *-ici-",
      "name": "inh"
    },
    {
      "args": {
        "1": "krl",
        "2": "-si-"
      },
      "expansion": "Karelian -si-",
      "name": "cog"
    },
    {
      "args": {
        "1": "vep",
        "2": "-isi-"
      },
      "expansion": "Veps -isi-",
      "name": "cog"
    },
    {
      "args": {
        "1": "fi",
        "2": "fiu-pro",
        "3": "*-ńće",
        "4": "*-ńće-j"
      },
      "expansion": "Proto-Finno-Ugric *-ńće-j",
      "name": "inh"
    },
    {
      "args": {
        "1": "urj-pro",
        "2": "*-ńśe",
        "3": "*-nśe-j"
      },
      "expansion": "*-nśe-j",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-ita",
        "id": "valita"
      },
      "expansion": "-ita",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "",
        "3": "-itse-"
      },
      "expansion": "-itse-",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-inen",
        "3": "-ise-"
      },
      "expansion": "-ise-",
      "name": "m"
    },
    {
      "args": {
        "1": "urj-fin-pro",
        "2": "*-inën"
      },
      "expansion": "*-inën",
      "name": "m"
    },
    {
      "args": {
        "1": "fi",
        "2": "-ia",
        "id": "verbal"
      },
      "expansion": "-ia",
      "name": "m"
    }
  ],
  "etymology_text": "From Proto-Finnic *-ici- (related to Karelian -si- and Veps -isi-), from Proto-Finno-Ugric *-ńće-j, *-nśe-j; derived from the same ending as in -ita (stem -itse-), and probably also the diminutive ending -ise- (see *-inën) + the same ending as in -ia.",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "interfix"
      },
      "expansion": "-isi-",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "interfix",
  "senses": [
    {
      "categories": [
        "Finnish interfixes",
        "Finnish lemmas",
        "Finnish links with redundant target parameters",
        "Finnish terms derived from Proto-Finnic",
        "Finnish terms derived from Proto-Finno-Ugric",
        "Finnish terms inherited from Proto-Finnic",
        "Finnish terms inherited from Proto-Finno-Ugric"
      ],
      "examples": [
        {
          "text": "voi (“he can”) + -isi- → voisi (“he could”)"
        },
        {
          "text": "katson (“I watch”) + -isi- → katsoisin (“I would watch”)"
        }
      ],
      "glosses": [
        "Marker of conditional mood in verbs."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-isi-"
}