parasite
/pa.ʁa.zit/
1.
nounmasculine
organism that lives on or in a host and benefits at the host's expense (parasite, e.g. worm, tick)
Le vétérinaire a trouvé un parasite dans l'intestin du chien.
The vet found a parasite in the dog's intestine.
2.
nounmasculine
freeloader; person who lives off or takes advantage of others
C'est un parasite : il vit chez sa sœur et ne contribue à rien.
He's a freeloader: he lives with his sister and doesn't contribute anything.
3.
nounmasculine
electrical/technical interference or noise on a line or signal
On n'entend rien à cause d'un parasite sur la ligne.
We can't hear anything because of interference on the line.
