infest (noun) /ɪnˈfɛst/
1
(obsolete) Hostility.
infest (verb) /ɪnˈfɛst/
1
(transitive) To inhabit a place in unpleasantly large numbers; to plague, harass.
2
(pathology, of a parasite) To invade a host plant or animal.
infest (adjective) /ɪnˈfɛst/
1
(obsolete) Mischievous; hurtful; harassing.