infesting Definition

infest
verb infested, infesting

1. Said of parasites such as fleas, lice and certain fungi: to invade and occupy another animal or plant.
2. Said of someone or something harmful or unpleasant: to exist in large numbers or quantities.

Example: Heroin-dealers infested the poorer parts of the city
Thesaurus: swarm around, overrun, overwhelm, flood, flock to, crowd, beset, abound in.

Derivative: infestation
noun

Etymology: 15c: from Latin infestare to assail or molest.