unheard-of
un·heard–of
adj \-ˌəv, -ˌäv\Definition of UNHEARD-OF
: previously unknown; especially : unprecedented <moving at unheard–of speeds>
See First Known Use of UNHEARD-OF
1592
Related to UNHEARD-OF
Synonyms: fresh, novel, original, strange, unaccustomed, unfamiliar, unheard-of, unknown, unprecedented
Related Words: innovative, unique; nontraditional, unconventional, untried, unused, unworn; pathbreaking, pioneering, trailblazing
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