"plain and simple" meaning in English

{
  "etymology_text": ": plain and simple < → δείτε τις λέξεις plain, and και simple",
  "forms": [
    {
      "form": "plain and simple"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ιδιωματισμοί (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "It’s laziness plain and simple.",
          "translation": "Δεν είναι τίποτα άλλο εκτός από τεμπελιά."
        }
      ],
      "glosses": [
        "άλλη μορφή του pure and simple"
      ],
      "id": "el-plain_and_simple-en-phrase-iHgEXodC",
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "plain and simple"
}

{
  "etymology_text": ": plain and simple < → δείτε τις λέξεις plain, and και simple",
  "forms": [
    {
      "form": "plain and simple"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Ιδιωματισμοί (αγγλικά)"
      ],
      "examples": [
        {
          "text": "It’s laziness plain and simple.",
          "translation": "Δεν είναι τίποτα άλλο εκτός από τεμπελιά."
        }
      ],
      "glosses": [
        "άλλη μορφή του pure and simple"
      ],
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "plain and simple"
}