"inefficient" meaning in English

{
  "categories": [
    {
      "kind": "other",
      "name": "Terms prefixed with in-",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "in",
        "2": "efficient"
      },
      "expansion": "in- + efficient",
      "name": "ety-prefix"
    }
  ],
  "etymology_text": "in- + efficient",
  "forms": [
    {
      "form": "inefficient",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "more inefficient",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most inefficient",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "more": "true"
      },
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "examples": [
        {
          "text": "The government is looking for the replacement of these inefficient 30-year old trains."
        },
        {
          "text": "John is so inefficient, Tim already completed 3 essays but he's still on his first."
        }
      ],
      "glosses": [
        "If someone or something is inefficient, it is not efficient."
      ],
      "id": "simple-inefficient-en-adj-ZH--93FH"
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌɪn.ɪˈfɪʃ.ənt/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-inefficient.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "inefficient"
}

{
  "categories": [
    "Terms prefixed with in-"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "in",
        "2": "efficient"
      },
      "expansion": "in- + efficient",
      "name": "ety-prefix"
    }
  ],
  "etymology_text": "in- + efficient",
  "forms": [
    {
      "form": "inefficient",
      "tags": [
        "positive"
      ]
    },
    {
      "form": "more inefficient",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most inefficient",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "more": "true"
      },
      "expansion": "[POS TABLE]",
      "name": "adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "examples": [
        {
          "text": "The government is looking for the replacement of these inefficient 30-year old trains."
        },
        {
          "text": "John is so inefficient, Tim already completed 3 essays but he's still on his first."
        }
      ],
      "glosses": [
        "If someone or something is inefficient, it is not efficient."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌɪn.ɪˈfɪʃ.ənt/"
    },
    {
      "audio": "LL-Q1860 (eng)-Vealhurl-inefficient.wav",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "inefficient"
}