"think twice" meaning in English

{
  "etymology_text": ": think twice < → δείτε τις λέξεις think και twice",
  "forms": [
    {
      "form": "think twice"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ιδιωματισμοί (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "He will think twice before he says such things again!",
          "translation": "Θα το καλοσκεφτεί πριν ξαναπεί τέτοια πράγματα!"
        },
        {
          "text": "I will think twice about inviting him to my house again!",
          "translation": "Θα το ξανασκεφτώ για να τον καλέσω σπίτι μου πάλι!"
        },
        {
          "text": "I hope you’ll think twice before going.",
          "translation": "Ελπίζω να το σκεφτείς ξανά προτού πας."
        }
      ],
      "glosses": [
        "καλοσκέφτομαι, σκέφτομαι ξανά / ξανασκέφτομαι κάτι με προσοχή, με περίσκεψη"
      ],
      "id": "el-think_twice-en-phrase-0HSbcmPY",
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "think twice"
}

{
  "etymology_text": ": think twice < → δείτε τις λέξεις think και twice",
  "forms": [
    {
      "form": "think twice"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Ιδιωματισμοί (αγγλικά)"
      ],
      "examples": [
        {
          "text": "He will think twice before he says such things again!",
          "translation": "Θα το καλοσκεφτεί πριν ξαναπεί τέτοια πράγματα!"
        },
        {
          "text": "I will think twice about inviting him to my house again!",
          "translation": "Θα το ξανασκεφτώ για να τον καλέσω σπίτι μου πάλι!"
        },
        {
          "text": "I hope you’ll think twice before going.",
          "translation": "Ελπίζω να το σκεφτείς ξανά προτού πας."
        }
      ],
      "glosses": [
        "καλοσκέφτομαι, σκέφτομαι ξανά / ξανασκέφτομαι κάτι με προσοχή, με περίσκεψη"
      ],
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "think twice"
}