That ‘t’ sound seems to have latched onto my brain, and after some confusion (on my part) with the suggestion of tuitear (from @latinimberbe, who was giving me the Spanish word, but I didn’t catch on), I was waiting to see if any ‘t’ words came to be suggested. Coincidentally, Daniel Russell (@NotusNasoNovit) brought up that he used ‘titiatum‘ to refer to Twitter because it did preserve the ‘t’. I had seen that word, but I could not discern whether it was Classical or Medieval. According to Daniel, in the OLD the word occurs in Suetonius — but not in the Lives of the Caesars, but in some obscure work called the Prata (fr. 161) which seems to be a catalog of animal noises. In the August Reifferscheid, Friedrich Wilhelm Ritschl edition which is online, we see the simple phrase: