"тресен" meaning in Bulgarian

{
  "forms": [
    {
      "form": "тре́сен",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "trésen",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "тре́сен",
        "2": "pass"
      },
      "expansion": "тре́сен • (trésen)",
      "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 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "tresá",
          "word": "треса́"
        }
      ],
      "glosses": [
        "indefinite masculine singular past passive participle of треса́ (tresá)"
      ],
      "id": "en-тресен-bg-verb-n3HCOE7R",
      "links": [
        [
          "треса́",
          "треса#Bulgarian"
        ]
      ],
      "tags": [
        "form-of",
        "indefinite",
        "masculine",
        "participle",
        "passive",
        "past",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈtrɛsɛn]"
    }
  ],
  "word": "тресен"
}

{
  "forms": [
    {
      "form": "тре́сен",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "trésen",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "тре́сен",
        "2": "pass"
      },
      "expansion": "тре́сен • (trésen)",
      "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 passive participles",
        "Bulgarian terms with IPA pronunciation",
        "Bulgarian verb forms",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "form_of": [
        {
          "extra": "tresá",
          "word": "треса́"
        }
      ],
      "glosses": [
        "indefinite masculine singular past passive participle of треса́ (tresá)"
      ],
      "links": [
        [
          "треса́",
          "треса#Bulgarian"
        ]
      ],
      "tags": [
        "form-of",
        "indefinite",
        "masculine",
        "participle",
        "passive",
        "past",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈtrɛsɛn]"
    }
  ],
  "word": "тресен"
}