"-mo" meaning in Slovak

{
  "etymology_templates": [
    {
      "args": {
        "1": "sk",
        "2": ":inh",
        "3": "zlw-osk:-mo<ety:inh<sla-pro:*-mo<id:adverbial suffix>>>",
        "text": "1",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Slavic *-mo\nOld Slovak -mo\nSlovak -mo\n[Appendix:Glossary#inherited|Inherited]] from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Old Slovak\", \"term\" : \"-mo\", \"status\" : \"inline\", \"lang\" : \"zlw-osk\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Slovak\", \"term\" : \"-mo\", \"status\" : \"ok\", \"lang\" : \"sk\" }\" data-lang=\"sk\" data-title=\"-mo\">\nInherited from Old Slovak -mo.",
      "name": "etymon"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Slavic *-mo\nOld Slovak -mo\nSlovak -mo\nInherited from Old Slovak -mo.",
  "head_templates": [
    {
      "args": {},
      "expansion": "-mo (adverb-forming suffix)",
      "name": "sk-adv"
    }
  ],
  "lang": "Slovak",
  "lang_code": "sk",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using etymon with no ID",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 11 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Slovak entries with etymology texts",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Slovak entries with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Slovak entries with incorrect language header",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "obkročiť + -mo → obkročmo",
          "type": "example"
        }
      ],
      "glosses": [
        "used to form adverbs from verbs"
      ],
      "id": "en--mo-sk-suffix-LYGhZWKH",
      "links": [
        [
          "adverb",
          "adverb#English"
        ],
        [
          "verb",
          "verb#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/mɔ/"
    },
    {
      "ipa": "[mɔ]"
    }
  ],
  "word": "-mo"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "sk",
        "2": ":inh",
        "3": "zlw-osk:-mo<ety:inh<sla-pro:*-mo<id:adverbial suffix>>>",
        "text": "1",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Slavic *-mo\nOld Slovak -mo\nSlovak -mo\n[Appendix:Glossary#inherited|Inherited]] from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Old Slovak\", \"term\" : \"-mo\", \"status\" : \"inline\", \"lang\" : \"zlw-osk\" } ], \"keyword_label\" : \"Inherited from\", \"keyword\" : \"inherited\" } ], \"lang_name\" : \"Slovak\", \"term\" : \"-mo\", \"status\" : \"ok\", \"lang\" : \"sk\" }\" data-lang=\"sk\" data-title=\"-mo\">\nInherited from Old Slovak -mo.",
      "name": "etymon"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Slavic *-mo\nOld Slovak -mo\nSlovak -mo\nInherited from Old Slovak -mo.",
  "head_templates": [
    {
      "args": {},
      "expansion": "-mo (adverb-forming suffix)",
      "name": "sk-adv"
    }
  ],
  "lang": "Slovak",
  "lang_code": "sk",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages using etymon with no ID",
        "Pages with 11 entries",
        "Pages with entries",
        "Pages with etymology trees",
        "Pages with inline etymon for redlinks",
        "Slovak 1-syllable words",
        "Slovak adverb-forming suffixes",
        "Slovak entries with etymology texts",
        "Slovak entries with etymology trees",
        "Slovak entries with incorrect language header",
        "Slovak lemmas",
        "Slovak suffixes",
        "Slovak terms derived from Old Slovak",
        "Slovak terms derived from Proto-Slavic",
        "Slovak terms inherited from Old Slovak",
        "Slovak terms inherited from Proto-Slavic",
        "Slovak terms with IPA pronunciation"
      ],
      "examples": [
        {
          "text": "obkročiť + -mo → obkročmo",
          "type": "example"
        }
      ],
      "glosses": [
        "used to form adverbs from verbs"
      ],
      "links": [
        [
          "adverb",
          "adverb#English"
        ],
        [
          "verb",
          "verb#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/mɔ/"
    },
    {
      "ipa": "[mɔ]"
    }
  ],
  "word": "-mo"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: adverb-forming suffix",
  "path": [
    "-mo"
  ],
  "section": "Slovak",
  "subsection": "suffix",
  "title": "-mo",
  "trace": ""
}