| unhear | Heard melodies are sweet, but those unheard are sweeter. |
| unheard | (adj) not necessarily inaudible but not heard |
| unheard-of | (adj) previously unknown, Example: a first novel by an unheard of writer; developments on an unheard-of scale |
| Unheard | a. What pangs I feel, unpitied and unheard! Dryden. [ 1913 Webster ] Nor was his name unheard or unadored. Milton. [ 1913 Webster ]
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| Unheard-of | a. New; unprecedented; unparalleled. Swift. [ 1913 Webster ] |
| Unheart | v. t. [ 1st pref. un- + heart. ] To cause to lose heart; to dishearten. [ Obs. ] Shak. [ 1913 Webster ] |