"pliboniĝu" meaning in Esperanto

{
  "head_templates": [
    {
      "args": {},
      "expansion": "pliboniĝu",
      "name": "eo-head"
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "verb",
  "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 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "pliboniĝi"
        }
      ],
      "glosses": [
        "imperative of pliboniĝi"
      ],
      "id": "en-pliboniĝu-eo-verb-4FVD7JYP",
      "links": [
        [
          "pliboniĝi",
          "pliboniĝi#Esperanto"
        ]
      ],
      "tags": [
        "form-of",
        "imperative"
      ]
    }
  ],
  "word": "pliboniĝu"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "pliboniĝu",
      "name": "eo-head"
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Esperanto entries with incorrect language header",
        "Esperanto non-lemma forms",
        "Esperanto verb forms",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "form_of": [
        {
          "word": "pliboniĝi"
        }
      ],
      "glosses": [
        "imperative of pliboniĝi"
      ],
      "links": [
        [
          "pliboniĝi",
          "pliboniĝi#Esperanto"
        ]
      ],
      "tags": [
        "form-of",
        "imperative"
      ]
    }
  ],
  "word": "pliboniĝu"
}