Webster's Revised Unabridged Dictionary · 1913

Infest

Infest , adjective

[Latin infestus. See Infest, transitive verb]

Mischievous; hurtful; harassing. [Obsolete] — Spenser

Infest , transitive verb

[Latin infestare, from infestus disturbed, hostile, troublesome; in in, against + the root of defendere: compare French 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