to weaken or lessen the force or strength of

to cause to taper or diminish in width (usu in passive)

to cause (a living being or plant) to grow disproportionately long and thin

the powerful frame attenuated by spare living — Dickens

to cause (something) to taper or diminish in width

to lessen the force or strength of (something)

If she had had a little more self-control she would have attenuated the emotion to nothing by sheer reasoning — Hardy

to reduce the amplitude of (an electrical signal or current)

to reduce the virulence of (a virus or other pathogen)

to make (e.g. air or the atmosphere) thin or rarefied in consistency

to become long and thin

to grow finer; to diminish or taper

to grow weaker

attenuated

tapering gradually

an attenuate leaf