"let up" meaning in English

{
  "forms": [
    {
      "form": "lets up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "letting up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "let up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "let up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "let<,,let> up"
      },
      "expansion": "let up (third-person singular simple present lets up, present participle letting up, simple past and past participle let up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English phrasal verbs with particle (up)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The rain shows no sign of letting up.",
          "type": "example"
        },
        {
          "ref": "2021, Taylor Swift (lyrics and music), “No Body, No Crime”, in evermore, performed by Taylor Swift and HAIM",
          "text": "I think he did it but I just can't prove it / No, no body, no crime / But I ain't letting up until the day I die",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To cease or stop."
      ],
      "id": "en-let_up-en-verb-dAE~sVE1",
      "links": [
        [
          "cease",
          "cease"
        ],
        [
          "stop",
          "stop"
        ]
      ],
      "raw_glosses": [
        "(intransitive) To cease or stop."
      ],
      "synonyms": [
        {
          "word": "leave off"
        },
        {
          "word": "let off"
        }
      ],
      "tags": [
        "intransitive"
      ]
    }
  ],
  "word": "let up"
}

{
  "forms": [
    {
      "form": "lets up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "letting up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "let up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "let up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "let<,,let> up"
      },
      "expansion": "let up (third-person singular simple present lets up, present participle letting up, simple past and past participle let up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English intransitive verbs",
        "English lemmas",
        "English multiword terms",
        "English phrasal verbs",
        "English phrasal verbs with particle (up)",
        "English terms with quotations",
        "English terms with usage examples",
        "English verbs"
      ],
      "examples": [
        {
          "text": "The rain shows no sign of letting up.",
          "type": "example"
        },
        {
          "ref": "2021, Taylor Swift (lyrics and music), “No Body, No Crime”, in evermore, performed by Taylor Swift and HAIM",
          "text": "I think he did it but I just can't prove it / No, no body, no crime / But I ain't letting up until the day I die",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To cease or stop."
      ],
      "links": [
        [
          "cease",
          "cease"
        ],
        [
          "stop",
          "stop"
        ]
      ],
      "raw_glosses": [
        "(intransitive) To cease or stop."
      ],
      "synonyms": [
        {
          "word": "leave off"
        },
        {
          "word": "let off"
        }
      ],
      "tags": [
        "intransitive"
      ]
    }
  ],
  "word": "let up"
}