1. Conducted with or marked by hidden aims or methods
   - clandestine, cloak-and-dagger, hole-and-corner, hugger-mugger, secret, surreptitious, undercover, underground

See also: covert

• empiricist
• empiricist philosophy
• Empirin
• emplace
• emplacement
• emplane
• unconnected
• unconnectedness
• unconquerable
• unconquered
• unconscientious
• unconscientiousness
• unconscionable
• unconscionably
• unconscious
• unconscious mind
• unconscious process
• unconsciously
• unconsciousness
• unconsecrated
• unconsidered
• unconsolable
• unconsolidated
• unconstipated
• unconstitutional