What is "infesting"

Infest \In*fest"\, v. t. [imp. & p. p. Infested; p. pr. & vb. n. Infesting.] [L. infestare, fr. infestus disturbed, hostile, troublesome; in in, against + the root of defendere: cf. F. infester. See Defend.] To trouble greatly by numbers or by frequency of presence; to disturb; to annoy; to frequent and molest or harass; as, fleas infest dogs and cats; a sea infested with pirates.

To poison vermin that infest his plants.
--Cowper.

These, said the genius, are envy, avarice, superstition, love, with the like cares and passions that infest human life.
--Addison.

And the cares, that infest the day, Shall fold their tents, like the Arabs, And as silently steal away.
--Longfellow.

vb. (present participle of infest English)