"guessive" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "guess",
        "3": "ive"
      },
      "expansion": "guess + -ive",
      "name": "suffix"
    }
  ],
  "etymology_text": "guess + -ive",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "guessive (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": "English terms suffixed with -ive",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "conjectural"
      ],
      "id": "en-guessive-en-adj-pEyq0PQn",
      "links": [
        [
          "conjectural",
          "conjectural"
        ]
      ],
      "raw_glosses": [
        "(rare, obsolete) conjectural"
      ],
      "tags": [
        "not-comparable",
        "obsolete",
        "rare"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛsɪv"
    }
  ],
  "word": "guessive"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "guess",
        "3": "ive"
      },
      "expansion": "guess + -ive",
      "name": "suffix"
    }
  ],
  "etymology_text": "guess + -ive",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "guessive (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 terms suffixed with -ive",
        "English terms with obsolete senses",
        "English terms with rare senses",
        "English uncomparable adjectives",
        "Rhymes:English/ɛsɪv",
        "Rhymes:English/ɛsɪv/2 syllables"
      ],
      "glosses": [
        "conjectural"
      ],
      "links": [
        [
          "conjectural",
          "conjectural"
        ]
      ],
      "raw_glosses": [
        "(rare, obsolete) conjectural"
      ],
      "tags": [
        "not-comparable",
        "obsolete",
        "rare"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛsɪv"
    }
  ],
  "word": "guessive"
}