Darkening

Verb
darkening

Adjectives
sudden; gradual; appreciable; perceptible; fathomless; ominous; unprecedented.

Thesaurus
blackening, blocking the light, burial, burying, clouding, concealedness, concealment, covering, covering up, covertness, deception, denigration, dimming, eclipsing, extinguishment, hiddenness, hiding, interment, invisibility, masking, melanization, mystification, nigrification, obfuscation, obnubilation, obscuration, obscurement, obumbration, occultation, occulting, overcast, overclouding, overshading, overshadowing, overshadowment, putting away, screening, secrecy, secretion, shading, shadowing, smirch, smirching, smudge, smudging, smut, smutch, smutching, subterfuge, uncommunicativeness

Anagrams

 * endarking