Definition of "unsent" []

• Not yet sent, mailed or posted (adjective)

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• "… I finally wrote your song, another unsent letter"
• "Von could still feel their link, but whenever he tried to reach Dante, his sending would vanish—a message unsent and unreceived, like an e-mail hovering in the Ethernet waiting for a downed server to reboot so it could slide into the appropriate inbox."
• "Writing all this down—these unsent letters, this memoir, if it can properly be called that—now appears to have been inevitable once this curtain of silence dropped between us four winters ago."