Sei serio is an Italian equivalent of 'Are you serious'. The verb 'sei' means '[you] are'. The masculine adjective 'serio' means 'serious'. Together, they're pronounced 'seh SEH-ree-oh'.
That's what's said to a male. If it's a case of a 'serious' female, the word becomes 'seria'. It's pronounced 'SEH-ree-ah'.
"Serious" is a literal English equivalent of the Italian word seria. The word functions as a feminine singular adjective. The pronunciation will be "SEH-rya" in Italian.
When translated from English to Italian a raccoon is a procione
"Out" in English is fuori in Italian.
"About" in English is circa in Italian.
"Or" in English is o in Italian.
"Serious" is an English equivalent of the Italian and Spanish word seria. The word serves as the feminine singular form of an adjective. The pronunciation will be "SEH-rya" in Italian and Spanish.
"Not italian" in English is non italiano in Italian.
"To have" in English means avere in Italian.
"And you?" in English is E tu? in Italian.
"Who we are" in English is Chi siamo in Italian.
"About me!" in English is Su di me! in Italian.
Questa in Italian is "this" in English.