I don't think -sst- is a possible sequence in Latin. (Neither is -ssr-, but that one suffers from the bigger problem that -sr- probably won't work either.) Mist

I don't think -sst- is a possible sequence in Latin. (Neither is -ssr-, but that one suffers from the bigger problem that -sr- probably won't work either.) Mistrix is certainly a word that could exist, but I have no knowledge of whether it would be a correct form for a female sender.