Words

raison d'être
cordon bleu
double entendre
billet doux
c'est la vie
cosa nostra
gnocchi
bruschetta
che sarà sarà
sine qua non
quid pro quo
ad hoc
carpe diem

Meaning

reason for living
expert French cooking
two different meanings
love letter
that's life
the Mafia
Italian dumplings
Italian bread snack
whatever will be, will be
something that's necessary
tit for tat
unplanned
sieze the moment