señas, f. pl., directions, address.
señor, m., gentleman, sir, Mr.
señora, lady, madam, Mrs.
señorita, f., young lady, Miss.
séptimo, -a, seventh.
ser, to be ([section 1]).
serio, -a, serious.
servir, to serve; —— de, to serve as; —— para, to do for, be good for ([section 125]).
si, if.
sí, yes, self (used for se with a prep.).