bastardly

[ bas-terd-lee ]
/ ˈbæs tərd li /

adjective

of no value; worthless.
spurious; counterfeit: a bastardly version of a text.
bastard; baseborn.
vicious or despicable.

Origin of bastardly

First recorded in 1545–55; bastard + -ly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019