parasite

Definitions

An organism that lives in or on an organism of another species and benefits by deriving nutrients at the other's expense.

A person who habitually relies on or exploits others and gives nothing in return.

Examples

The tick is a common parasite that feeds on the blood of mammals.

He felt like a parasite, living off his parents' money well into his thirties.

The documentary explored how the parasite alters the behavior of its host to ensure its own survival.

Synonyms

leech freeloader sponge scrounger moocher hanger-on blood-sucker

Antonyms

benefactor provider philanthropist supporter donor contributor producer