Entries on ثمت in 3 Arabic dictionaries by the authors Murtaḍa al-Zabīdī, Tāj al-ʿArūs fī Jawāhir al-Qamūs, Arabic-English Lexicon by Edward William Lane and Ibn Manẓūr, Lisān al-ʿArab
Permalink (الرابط القصير إلى هذا الباب): https://arabiclexicon.hawramani.com/?p=6645&book=50#4434a0
ثمت
ثُمَّت and ثُمَّتْ: see ثُمَّ.