Where does “тбилисский” come from?

тбилисский (Russian) comes from Russian Тбили́си, from Georgian თბილისი, from Georgian თბილი, from Old Georgian ტფილი, from Proto-Kartvelian ṭep- — to warm oneself.

Ancestry of “тбилисский”, step by step

StepLanguageWordMeaning
1RussianТбили́си—
2Georgianთბილისი—
3Georgianთბილიwarm
4Old Georgianტფილიwarm
5Proto-Kartvelianṭep-to warm oneself
Every word from Proto-Kartvelian ṭep- →Every word from Old Georgian ტფილი →Every word from Georgian თბილი →