unduplicable en · ADJ
Etymology
From un- + duplicable.
Meanings
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(not-comparable) Impossible to duplicate.
The response was overwhelming and, unfortunately, unduplicable. After "Long Tall Shorty", "Alimony," and further sides stiffed, Tommy returned to school.
1990, Wayne Jancik, The Billboard Book of One-Hit Wonders, →ISBN, page 152:A convent is a world apart, unduplicable.
2009 July 9, Jane Gross, “Sisters Face Death With Dignity and Reverence”, in New York Times: