"þy læs" meaning in Old English

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "enm",
            "2": "les te"
          },
          "expansion": "Middle English: les te",
          "name": "desc"
        }
      ],
      "text": "Middle English: les te (from late variant þȳ lǣs þe)"
    },
    {
      "depth": 2,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "lest"
          },
          "expansion": "English: lest",
          "name": "desc"
        }
      ],
      "text": "English: lest"
    }
  ],
  "forms": [
    {
      "form": "þȳ lǣs",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ang",
        "2": "conjunction",
        "head": "þȳ lǣs"
      },
      "expansion": "þȳ lǣs",
      "name": "head"
    }
  ],
  "lang": "Old English",
  "lang_code": "ang",
  "pos": "conj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "You have to do what you can, so you don't regret it later.",
          "text": "Þū sċealt dōn þætte þū meaht, þȳ lǣs þē hit lator hrēowe.",
          "type": "example"
        },
        {
          "english": "Spare us, Lord, spare your people, and don't give your inheritance to the pagans! Don't let them say, “Where is the god of the Christians?”",
          "text": "Spara ūs, Dryhten, spara þīnum folce, and ne sele þīn ierfe þām hǣðenum, þȳ lǣs hīe cweðen “Hwǣr is þāra cristenena god?”",
          "type": "example"
        }
      ],
      "glosses": [
        "so that ... not: before, or else"
      ],
      "id": "en-þy_læs-ang-conj-SMEe4OOr",
      "links": [
        [
          "before",
          "before"
        ],
        [
          "or else",
          "or else"
        ]
      ],
      "synonyms": [
        {
          "sense": "or else",
          "word": "elles"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/θyː læːs/"
    }
  ],
  "word": "þy læs"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "enm",
            "2": "les te"
          },
          "expansion": "Middle English: les te",
          "name": "desc"
        }
      ],
      "text": "Middle English: les te (from late variant þȳ lǣs þe)"
    },
    {
      "depth": 2,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "lest"
          },
          "expansion": "English: lest",
          "name": "desc"
        }
      ],
      "text": "English: lest"
    }
  ],
  "forms": [
    {
      "form": "þȳ lǣs",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ang",
        "2": "conjunction",
        "head": "þȳ lǣs"
      },
      "expansion": "þȳ lǣs",
      "name": "head"
    }
  ],
  "lang": "Old English",
  "lang_code": "ang",
  "pos": "conj",
  "senses": [
    {
      "categories": [
        "Old English conjunctions",
        "Old English entries with incorrect language header",
        "Old English lemmas",
        "Old English multiword terms",
        "Old English terms with IPA pronunciation",
        "Old English terms with usage examples"
      ],
      "examples": [
        {
          "english": "You have to do what you can, so you don't regret it later.",
          "text": "Þū sċealt dōn þætte þū meaht, þȳ lǣs þē hit lator hrēowe.",
          "type": "example"
        },
        {
          "english": "Spare us, Lord, spare your people, and don't give your inheritance to the pagans! Don't let them say, “Where is the god of the Christians?”",
          "text": "Spara ūs, Dryhten, spara þīnum folce, and ne sele þīn ierfe þām hǣðenum, þȳ lǣs hīe cweðen “Hwǣr is þāra cristenena god?”",
          "type": "example"
        }
      ],
      "glosses": [
        "so that ... not: before, or else"
      ],
      "links": [
        [
          "before",
          "before"
        ],
        [
          "or else",
          "or else"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/θyː læːs/"
    }
  ],
  "synonyms": [
    {
      "sense": "or else",
      "word": "elles"
    }
  ],
  "word": "þy læs"
}