key
key
adjective
Of crucial importance.
"She played a key role in the project."
noun
Something that provides a solution.
"Education is the key to success."
noun
A set of notes based on a particular note.
"This song is in the key of C major."
noun
A button on a keyboard.
"Press the Enter key."
noun
A device for opening a lock.
"I lost my house key."
Thesaurus
Synonyms: central, fundamental, important, primal, of import, cardinal, Francis Scott Key, key out, discover, identify, distinguish, name