unprecedently

English

Etymology

un- +‎ precedent +‎ -ly

Adverb

unprecedently (comparative more unprecedently, superlative most unprecedently)

1. In a manner or to a degree that has no precedent.
   • 1916, W. Grant Hague, M.D., The Eugenic Marriage, Volume I. (of IV.)‎^[1]:

     Despite the fact that these women were starved and badly clad and deprived of the comforts of home, the death rate of the infants dropped steadily to an unprecedently low mark.