infest

verb

1. (transitive)To inhabit a place in unpleasantly large numbers; to plague, harass.

   “Insects are infesting my basement!”

   “Sir, my liege, Do not infest your mind with beating on The strangeness of this business; at pick’d leisure Which shall be shortly, I’ll resolve you, Which to you shall seem probable, of every These happen’d accidents; till when, be cheerful And think of each thing well.”

   “I come now to speak of the Pyrates infesting the West-Indies, where they are more numerous than in any other Parts of the World, on several Reasons […]”

   “It has often happened, that whole caravans have perished in crossing those deserts, either by the burning winds that infest them, or by the sands which are raised by the tempest, and overwhelm every creature in certain ruin.”

   “Nor was the biscuit much better; nearly all of it was broken into hard, little gunflints, honeycombed through and through, as if the worms usually infesting this article in long tropical voyages had, in boring after nutriment, come out at the antipodes without finding anything.”

2. To invade a host plant or animal.

adj

1. (obsolete)Mischievous; hurtful; harassing.

   “[…] The swarme of scaled snakes Did make an yrksome noyce to heare, as she her tresses shakes. About her shoulders some did craule, some trayling downe her brest, Did hisse, and spit out poison greene, and spirt with tongues infest.”

   “He stayed not t’advize, which way were best His foe t’assayle, or how himselfe to gard, But with fierce fury and with force infest Upon him ran […]”

noun

1. (obsolete, uncountable)Hostility.

   “1590, Edmund Spenser, The Faerie Queene, Book II, Canto Eleven, Stanza 32, Hackett, 2006, p. 191, Like as a fire, the which in hollow cave Hath long bene underkept, and down supprest, With murmurous disdayne doth inly rave, And grudge, in so streight prison to be prest, At last breakes forth with furious infest, And strives to mount unto his native seat […]”