darkening (n.)
- blackening
- burial
- burying
- clouding
- concealment
- covering
- covertness
- deception
- denigration
- hiddenness
- hiding
- interment
- invisibility
- masking
- mystification
- obfuscation
- occultation
- overcast
- screening
- secrecy
- secretion
- shading
- shadowing
- smirch
- smudge
- smut
- subterfuge
- uncommunicativeness
