"tribo-" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "grc",
        "3": "τρίβω",
        "4": "",
        "5": "to rub"
      },
      "expansion": "Ancient Greek τρίβω (tríbō, “to rub”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek τρίβω (tríbō, “to rub”).",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "prefix"
      },
      "expansion": "tribo-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "tri‧bo"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 5 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "tribo- (pertaining to friction)"
      ],
      "id": "en-tribo--eo-prefix-vWSJxBNg",
      "links": [
        [
          "tribo-",
          "tribo-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈtribo]"
    },
    {
      "rhymes": "-ibo"
    }
  ],
  "word": "tribo-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "grc",
        "3": "τρίβω",
        "4": "",
        "5": "to rub"
      },
      "expansion": "Ancient Greek τρίβω (tríbō, “to rub”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek τρίβω (tríbō, “to rub”).",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "prefix"
      },
      "expansion": "tribo-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "tri‧bo"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto prefixes",
        "Esperanto terms derived from Ancient Greek",
        "Esperanto terms with IPA pronunciation",
        "Pages with 5 entries",
        "Pages with entries",
        "Rhymes:Esperanto/ibo"
      ],
      "glosses": [
        "tribo- (pertaining to friction)"
      ],
      "links": [
        [
          "tribo-",
          "tribo-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈtribo]"
    },
    {
      "rhymes": "-ibo"
    }
  ],
  "word": "tribo-"
}