Noah Webster
Attenuate
ATTEN'UATE, verb transitive [Latin attenuo, of ad and tenuo, to make thin; tenuis; Eng. thin, which see.]
1. To make thin or less consistent; to subtilize or break the humors of the body into finer parts; to render less viscid; opposed to condense, incrassate or thicken.
2. To comminute; to break or wear solid substances into finer or very minute parts.
This uninterrupted motion must attenuate and wear away the hardest rocks.
3. To make slender; to reduce in thickness.
ATTEN'UATE, adjective Made thin, or less viscid; made slender.