From MorgueFile

Attenuate means to make something slender, fine, or small.

I attenuated the stick to a point. 

It also means to weaken, or to become thin, weak or fine.

Go attenuate that wall, so we can break it down.

The stick was attenuating as I was attenuating it.

As an adjective, attenuate means reduced or weakened.

The boy became attenuated after years of bullying.

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