1. Incapable of being perceived or known
   - incognoscible, incognisable [Brit]

See also: imperceptible, unperceivable

• dark-grey
• dark-haired
• dark-skinned
• dark-spotted
• darken
• darkened
• darkener
• darkening
• darkey
• darkie
• darkish
• darkle
• darkling
• darkling beetle
• darkling groung beetle
• darkly
• darkness
• darkroom
• darksome
• darky
• darling
• darling pea
• Darling River
• Darlingtonia
• Darlingtonia californica