keys
keys
noun
Buttons on a musical instrument, such as a piano, that produce notes.
"She pressed the black keys on the piano."
noun
Small metal objects used to lock, unlock, or start things like doors or cars.
"I can't find my car keys anywhere."
Thesaurus
Synonyms: central, fundamental, important, primal, of import, cardinal, Francis Scott Key, key out, discover, identify, distinguish, name