The term 'not spoken' can be described in several ways. The four-letter word 'SUNG' means to make music with the voice, while the five-letter word 'TACIT' means implied or understood without being expressed. The eight-letter word 'UNVOICED' means not uttered aloud, and the six-letter word 'UNSAID' means not expressed in words. Finally, the eight-letter word 'UNSTATED' means not expressed in words or stated explicitly. All of these words refer to something that is not spoken, either through words or song.