mildew

noun

1. (countable, uncountable)A growth of minute powdery or webby fungi, whitish or of different colors, found on various diseased or decaying substances.

verb

1. (transitive)To taint with mildew.

   “Hee giues the Web and the Pin, ſquints the eye, and makes the Hare‐lippe; Mildewes the white Wheate, and hurts the poore Creature of earth.”

2. (intransitive)To become tainted with mildew.

   “His bald purplish head now looked for all the world like a mildewed skull.”