1. Not accessible to direct observation

See also: imperceptible, unperceivable

• banker's check
• banker's cheque
• banker's draft
• Bankhead
• Bankia
• Bankia setaceae
• banking
• banking company
• banking concern
• banking game
• banking industry
• banking system
• banknote
• bankroll
• bankrupt
• bankruptcy
• Banks
• banksia
• Banksia integrifolia
• banksia rose
• banned
• banner
• banneret
• bannerlike
• banning