verb

Reduce the force, effect, or value of.

her intolerance was attenuated by an unexpected liberalism

weakened,reduced,lessened,decreased,diminished,impaired,enervated

adjective

Reduced in force, effect, or physical thickness.

the doctrines of Christianity became very attenuate and distorted

thin,slender,slim,skinny,spindly,bony,gaunt,skeletal