Fiske 60

so dark as to be barely visible; indistinct; hidden; not well-known; not easily understood; inconspicuous

• obscure
• crepuscular
• tenebrous
• penumbra

dim; like twilight

• crepuscular
• dusky
• swarthy
• shrouded

occurring at night; most active at night

• nocturnal
• lowering
• shrouded
• opaque

dark and gloomy; used exclusively to describe literal darkness

• tenebrous
• nocturnal
• penumbra
• obscure

dark complexions

• swarthy
• obscure
• opaque
• lowering

something that conceals, protects, or screens

• shrouded
• opaque
• obscure
• nocturnal

the darkest hour of twilight

• dusky
• penumbra
• nocturnal
• crepuscular

impenetrable by light

• opaque
• shrouded
• lowering
• swarthy

to appear dark or threatening

• lowering
• swarthy
• dusky
• tenebrous

partial shadow; an area in which something exists to an uncertain degree

• penumbra
• tenebrous
• crepuscular
• dusky