Parasitical
(adjective)
Related to or characteristic of a parasite; living off or at the expense of another.
Origin:
Parasite + -ical.
Examples:
- The plant was killed by the parasitical fungus.
- The relationship between the host and the parasite is often harmful to the host.
- The parasitical relationship between the two species was studied by the scientists.
- The employee's behavior was seen as parasitical as he only worked when someone else was present.
- The company's success was built on parasitical relationships with other firms.