behind the curtain behind the scenes camouflaged concealed disguised hidden imperceptible indiscernible insensible invisible latent out of sight secret sightless submerged unapparent unbeheld unbeholdable unconsidered undescried undiscernible unheeded unmarked unminded unmissed unnoted unnoticed unperceivable unperceived unrealized unregarded unremarked unseeable unseen unthought-of unviewed unwitnessed viewless