"per-" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "per"
      },
      "expansion": "Back-formation from per",
      "name": "back-formation"
    }
  ],
  "etymology_text": "Back-formation from per.",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "prefix"
      },
      "expansion": "per-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "per"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto back-formations",
          "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": "Pages with 9 entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "per- + labori (“to work”) → perlabori (“to earn”)",
          "type": "example"
        },
        {
          "text": "per- + ludi (“to play”) → perludi (“to win”)",
          "type": "example"
        },
        {
          "text": "per- + flati (“to flatter”) → perflati (“to coax”)",
          "type": "example"
        }
      ],
      "glosses": [
        "denotes that the action expressed by the root becomes a means to attain a goal"
      ],
      "id": "en-per--eo-prefix-fN6nfQ17",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[per]"
    }
  ],
  "word": "per-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "per"
      },
      "expansion": "Back-formation from per",
      "name": "back-formation"
    }
  ],
  "etymology_text": "Back-formation from per.",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "prefix"
      },
      "expansion": "per-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "per"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Esperanto back-formations",
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto prefixes",
        "Esperanto terms with IPA pronunciation",
        "Pages with 9 entries"
      ],
      "examples": [
        {
          "text": "per- + labori (“to work”) → perlabori (“to earn”)",
          "type": "example"
        },
        {
          "text": "per- + ludi (“to play”) → perludi (“to win”)",
          "type": "example"
        },
        {
          "text": "per- + flati (“to flatter”) → perflati (“to coax”)",
          "type": "example"
        }
      ],
      "glosses": [
        "denotes that the action expressed by the root becomes a means to attain a goal"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[per]"
    }
  ],
  "word": "per-"
}