keyless
adjectiveUK /ˈkiːləs/
US /ˈkiːləs/
Something keyless does not need a key to work.
Our new car is keyless, so you just press a button to start it.
OTHER MEANINGS
2. Not having a key or keys.
He stood keyless at the door, unable to get inside.
3. Operating without a physical key, as by a code or remote signal.
The hotel uses keyless entry cards for all its rooms.
4. In music, not written or played in a particular key.
The composer wrote a keyless passage that drifts between tones.