V. be opaque &c adj.; obstruct the passage of light; obfuscate,
offuscate†.
Adj. opaque, impervious to light; adiaphanous†; dim &c 422; turbid,
thick, muddy, opacous†, obfuscated, fuliginous†, cloud, hazy, misty,
foggy, vaporous, nubiferous†, muggy† &c (turbidity) 426.1.
smoky, fumid†, murky, dirty.
426a. Turbidity — N. turbidity, cloudiness, fog, haze, muddiness,
haziness, obscurity.
nephelometer [instrument to measure turbidity].
Adj. turbid, thick, muddy, obfuscated, fuliginous†, hazy, misty, foggy,
vaporous, nubiferous†; cloudy (cloud) 353.
smoky, fumid†, murky, dirty.