Where does “ტფილისი” come from?

ტფილისი (Georgian) comes from Old Georgian ტფილისი, from Old Georgian ტფილი, from Proto-Kartvelian ṭep- — to warm oneself.

Ancestry of “ტფილისი”, step by step

StepLanguageWordMeaning
1Old GeorgianტფილისიTbilisi
2Old Georgianტფილიwarm
3Proto-Kartvelianṭep-to warm oneself
Every word from Proto-Kartvelian ṭep-Every word from Old Georgian ტფილიEvery word from Old Georgian ტფილისი