haleine

/alɛn/
1.
nounfeminineSing

breath; the air expelled when breathing

Il a mauvaise haleine ce matin.

He has bad breath this morning.

Synonyms:souffle, respiration
2.
nounfeminineSing

stamina/long-lasting effort — used especially in fixed expressions (e.g., 'de longue haleine' = long-term, requiring sustained effort)

C'est un projet de longue haleine.

It's a long-term project that will require sustained effort.

Synonyms:endurance, souffle
haleine - French Definition & Examples