"lengjast" meaning in Icelandic

{
  "etymology_templates": [
    {
      "args": {
        "1": "is",
        "2": "lengja",
        "3": "-st"
      },
      "expansion": "lengja + -st",
      "name": "af"
    }
  ],
  "etymology_text": "From lengja + -st.",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "verb"
      },
      "expansion": "lengjast",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "lengjast",
      "name": "is-verb"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Icelandic terms suffixed with -st",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "become longer"
      ],
      "id": "en-lengjast-is-verb-8FOseAqS"
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈleiɲcast/"
    },
    {
      "rhymes": "-eiɲcast"
    }
  ],
  "word": "lengjast"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "is",
        "2": "lengja",
        "3": "-st"
      },
      "expansion": "lengja + -st",
      "name": "af"
    }
  ],
  "etymology_text": "From lengja + -st.",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "verb"
      },
      "expansion": "lengjast",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "lengjast",
      "name": "is-verb"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Icelandic entries with incorrect language header",
        "Icelandic lemmas",
        "Icelandic terms suffixed with -st",
        "Icelandic verbs",
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:Icelandic/eiɲcast"
      ],
      "glosses": [
        "become longer"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈleiɲcast/"
    },
    {
      "rhymes": "-eiɲcast"
    }
  ],
  "word": "lengjast"
}