to disguise the appearance of something, to mask, to conceal ...1654 obs. rare
from Italian mascherare (to mask, to hide, to conceal) from maschera + - ate
FIRST DOCUMENTED USE
1654 - see EXAMPLE below
"...Wicked man, answered the Infanta, how skilfull thou art to mascherate thy excuses! Thy perfidiousnesse might move me, if I had not proved the dammages of thy disloyalty. Tell me, tell me, perfidious man, how thou canst colour thy flight?..."
From: Dianea: An Excellent New Romance
Written in Italian by Giovanni Francesco Loredano
Translated into English by Sir Aston Cokaine