"دیـ" meaning in Persian

{
  "etymology_text": "From archaic دی (“yester”, adverb). See there for more details.",
  "forms": [
    {
      "form": "di-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "fa",
        "2": "prefix",
        "tr": "di-"
      },
      "expansion": "دیـ • (di-)",
      "name": "head"
    }
  ],
  "lang": "Persian",
  "lang_code": "fa",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Persian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "roman": "diruz",
          "word": "دیروز"
        },
        {
          "roman": "disâl",
          "word": "دیسال"
        },
        {
          "roman": "dišab",
          "word": "دیشب"
        }
      ],
      "glosses": [
        "yester-"
      ],
      "id": "en-دیـ-fa-adv-5Izl7DHJ",
      "links": [
        [
          "yester-",
          "yester-"
        ]
      ]
    }
  ],
  "word": "دیـ"
}

{
  "derived": [
    {
      "roman": "diruz",
      "word": "دیروز"
    },
    {
      "roman": "disâl",
      "word": "دیسال"
    },
    {
      "roman": "dišab",
      "word": "دیشب"
    }
  ],
  "etymology_text": "From archaic دی (“yester”, adverb). See there for more details.",
  "forms": [
    {
      "form": "di-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "fa",
        "2": "prefix",
        "tr": "di-"
      },
      "expansion": "دیـ • (di-)",
      "name": "head"
    }
  ],
  "lang": "Persian",
  "lang_code": "fa",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Persian entries with incorrect language header",
        "Persian lemmas",
        "Persian prefixes"
      ],
      "glosses": [
        "yester-"
      ],
      "links": [
        [
          "yester-",
          "yester-"
        ]
      ]
    }
  ],
  "word": "دیـ"
}