keyless

[ kee-lis ]
/ ˈki lɪs /

adjective

lacking a key or keys.
requiring no key or keys: a keyless lock operated by a series of push buttons.

Origin of keyless

First recorded in 1815–25; key1 + -less
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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