What does "rafath" mean in this āyah?

Imām Ibn al-Jawzī (d. 597/1201) summarized the scholars' opinions in his book "Zād al-Masīr" as follows:

1. It refers to intercourse. [Ibn ʿUmar, al-Ḥasan, ʿIkrimah, Mujāhid, Qatādah, and others]
2. It refers to intercourse as well as that which is less that it, such as any suggestive speech related to it. [Also reported from Ibn ʿUmar, Ibn ʿAbbās, ʿAmr ibn Dīnār, and others]
3. It refers to idle talk. [Abū ʿAbd al-Raḥmān al-Yazīdī]