señorita
/seɲoˈɾita/ · A1 · noun · f
girl
👩 señor + -ita (little) = little lady, hence Miss
Señora is the feminine of señor (from Latin senior, elder). Add the diminutive -ita and you get a little señora: a young or unmarried woman, used as the title Miss. The snob sense mocks someone acting too refined.