"For life" is an English equivalent of the Italian phrase per la vita. The preposition and feminine singular definite article and noun model a difference between the two languages whereby English does not employ "the" -- and therefore eliminates it from Italian to English translations -- whereas Italian does, in this case with la. The pronunciation will be "per la VEE-ta" in Italian.
L'amore per la vita in Italian means "the love for life" in English.
per la vita
"Wedding congratulations!" in English is Auguri per una vita d'amore insieme! in Italian.
fratello e sorella per la vita
Voglio stare insieme a te per tutta la vita
Per chi? in Italian means "For whom?" in English.
"Please!" in English is Per favore! in Italian.
"To teach you" in English is per insegnarti in Italian.
"For eternity" in English is per l'eternità in Italian.
Sempre per sempre in Italian means "always (and) forever" in English.
Germania per sempre! in Italian is "Germany forever!" in English.
Batte per te in Italian means "Beats for you" in English.