unheard-of

Synonyms

fresh, new, novel, original, strange, unaccustomed, unfamiliar, unknown, unprecedented;

Antonyms

familiar, hackneyed, old, time-honored, tired, warmed-over;

Near Antonyms

conventional, established, traditional, tried, tried-and-true;

derivative, imitative;

Related Words

innovative, unique;

nontraditional, unconventional, untried, unused, unworn;

pathbreaking, pioneering, trailblazing;