You can say "salve, fili" in Latin to mean "hello son."
Filium is the objective case of the Latin word filius which means "son".
Filius oblitus.
It's Latin for "and of the son".
Of the son; or 'son!' (vocative, direct address).
Filius.
Meus filius
Filius
Accusative singular of 'filius,' meaning 'son.'
filius est
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To say the words Son of God in Latin you say Filius Dei. These words are said in Italian as Figlio di Dio.