"-ero" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "fr",
        "3": "-aire"
      },
      "expansion": "French -aire",
      "name": "der"
    },
    {
      "args": {
        "1": "eo",
        "2": "grc",
        "3": "μέρος",
        "4": "",
        "5": "part, component"
      },
      "expansion": "Ancient Greek μέρος (méros, “part, component”)",
      "name": "der"
    }
  ],
  "etymology_text": "Possibly from French -aire; however, compare Ancient Greek μέρος (méros, “part, component”).",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "suffix"
      },
      "expansion": "-ero",
      "name": "head"
    }
  ],
  "hyphenation": [
    "e‧ro"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto 1894 Universala Vortaro",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto BRO1",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Words approved by the Akademio de Esperanto",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "greno (“grain”) + -ero → grenero (“seed of grain”)",
          "type": "example"
        },
        {
          "text": "sablo (“sand”) + -ero → sablero (“grain of sand”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Denotes a particle of something."
      ],
      "id": "en--ero-eo-suffix-8QqHnVfY",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈero]"
    },
    {
      "rhymes": "-ero"
    }
  ],
  "word": "-ero"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "fr",
        "3": "-aire"
      },
      "expansion": "French -aire",
      "name": "der"
    },
    {
      "args": {
        "1": "eo",
        "2": "grc",
        "3": "μέρος",
        "4": "",
        "5": "part, component"
      },
      "expansion": "Ancient Greek μέρος (méros, “part, component”)",
      "name": "der"
    }
  ],
  "etymology_text": "Possibly from French -aire; however, compare Ancient Greek μέρος (méros, “part, component”).",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "suffix"
      },
      "expansion": "-ero",
      "name": "head"
    }
  ],
  "hyphenation": [
    "e‧ro"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Esperanto 1894 Universala Vortaro",
        "Esperanto BRO1",
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto suffixes",
        "Esperanto terms derived from Ancient Greek",
        "Esperanto terms derived from French",
        "Esperanto terms with IPA pronunciation",
        "Rhymes:Esperanto/ero",
        "Words approved by the Akademio de Esperanto"
      ],
      "examples": [
        {
          "text": "greno (“grain”) + -ero → grenero (“seed of grain”)",
          "type": "example"
        },
        {
          "text": "sablo (“sand”) + -ero → sablero (“grain of sand”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Denotes a particle of something."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈero]"
    },
    {
      "rhymes": "-ero"
    }
  ],
  "word": "-ero"
}