"затресяло" meaning in Bulgarian

{
  "forms": [
    {
      "form": "затреся́ло",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "zatresjálo",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "затреся́ло"
      },
      "expansion": "затреся́ло • (zatresjálo)",
      "name": "bg-part form"
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Bulgarian entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "zatresá",
          "word": "затреса́"
        }
      ],
      "glosses": [
        "neuter singular past active imperfect participle of затреса́ (zatresá)"
      ],
      "id": "en-затресяло-bg-verb-ULJIhZqA",
      "links": [
        [
          "затреса́",
          "затреса#Bulgarian"
        ]
      ],
      "tags": [
        "active",
        "form-of",
        "imperfect",
        "neuter",
        "participle",
        "past",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zɐtrɛˈsʲa̟ɫo]"
    }
  ],
  "word": "затресяло"
}

{
  "forms": [
    {
      "form": "затреся́ло",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "zatresjálo",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "затреся́ло"
      },
      "expansion": "затреся́ло • (zatresjálo)",
      "name": "bg-part form"
    }
  ],
  "lang": "Bulgarian",
  "lang_code": "bg",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Bulgarian entries with incorrect language header",
        "Bulgarian non-lemma forms",
        "Bulgarian participle forms",
        "Bulgarian terms with IPA pronunciation",
        "Bulgarian verb forms",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "form_of": [
        {
          "extra": "zatresá",
          "word": "затреса́"
        }
      ],
      "glosses": [
        "neuter singular past active imperfect participle of затреса́ (zatresá)"
      ],
      "links": [
        [
          "затреса́",
          "затреса#Bulgarian"
        ]
      ],
      "tags": [
        "active",
        "form-of",
        "imperfect",
        "neuter",
        "participle",
        "past",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[zɐtrɛˈsʲa̟ɫo]"
    }
  ],
  "word": "затресяло"
}