"гребял" meaning in Bulgarian

{
  "forms": [
    {
      "form": "гребя́л",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "grebjál",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "гребя́л",
        "2": "impf"
      },
      "expansion": "гребя́л • (grebjál)",
      "name": "bg-part"
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Bulgarian 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": [
        {
          "extra": "grebá",
          "word": "греба́"
        }
      ],
      "glosses": [
        "masculine singular past active imperfect participle of греба́ (grebá)"
      ],
      "id": "en-гребял-bg-verb-m24kSz91",
      "links": [
        [
          "греба́",
          "греба#Bulgarian"
        ]
      ],
      "tags": [
        "active",
        "form-of",
        "imperfect",
        "masculine",
        "participle",
        "past",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ɡrɛˈbʲa̟ɫ]"
    }
  ],
  "word": "гребял"
}

{
  "forms": [
    {
      "form": "гребя́л",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "grebjál",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "гребя́л",
        "2": "impf"
      },
      "expansion": "гребя́л • (grebjál)",
      "name": "bg-part"
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Bulgarian entries with incorrect language header",
        "Bulgarian non-lemma forms",
        "Bulgarian participles",
        "Bulgarian past active imperfect participles",
        "Bulgarian terms with IPA pronunciation",
        "Bulgarian verb forms",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "form_of": [
        {
          "extra": "grebá",
          "word": "греба́"
        }
      ],
      "glosses": [
        "masculine singular past active imperfect participle of греба́ (grebá)"
      ],
      "links": [
        [
          "греба́",
          "греба#Bulgarian"
        ]
      ],
      "tags": [
        "active",
        "form-of",
        "imperfect",
        "masculine",
        "participle",
        "past",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ɡrɛˈbʲa̟ɫ]"
    }
  ],
  "word": "гребял"
}