1. Lacking or not requiring a key
   "a keyless lock operated by a series of pushbuttons"

Antonym: keyed

Encyclopedia: Keyless

• unsyllabled
• unsymbolic
• unsymmetric
• unsymmetrical
• unsymmetrically
• unsympathetic
• unsympathetically
• unsympathising
• unsympathizing
• unsynchronised
• unsynchronized
• unsynchronous
• exorciser
• exorcism
• exorcist
• exorcize
• exordial
• exordium
• exoskeletal
• exoskeleton
• exosphere
• exostosis
• exoteric
• exotherm
• exothermal