INFUSCATE
infuscate
(verb) darken with a brownish tinge, as of insect wings
Source: WordNet® 3.1
Etymology
Verb
infuscate (third-person singular simple present infuscates, present participle infuscating, simple past and past participle infuscated)
(transitive) To darken; to make black or obscure.
Adjective
infuscate (comparative more infuscate, superlative most infuscate)
Clouded with brown.
Source: Wiktionary
In*fus"cate, v. t. Etym: [L. infuscatus, p. p. of infuscare; pref.
in- in + fuscare to make dark, fr. fuscus dark.]
Definition: To darken; to make black; to obscure.
Source: Webster’s Unabridged Dictionary 1913 Edition