The Collaborative International Dictionary
Infuscate
Infuscate \In*fus"cate\, v. t. [L. infuscatus, p. p. of infuscare; pref. in- in + fuscare to make dark, fr. fuscus dark.] To darken; to make black; to obscure.
Wiktionary
infuscate
vb. To darken; to make black or obscure.
WordNet
infuscate
v. darken with a brownish tinge, as of insect wings