From un- + decorous. <span class="searchmatch">undecorous</span> (comparative more <span class="searchmatch">undecorous</span>, superlative most <span class="searchmatch">undecorous</span>) Not decorous....
<span class="searchmatch">undecorously</span> (comparative more <span class="searchmatch">undecorously</span>, superlative most <span class="searchmatch">undecorously</span>) In an <span class="searchmatch">undecorous</span> manner....
<span class="searchmatch">undecorousness</span> (uncountable) Alternative form of indecorousness....
also Thesaurus:virtuous Antonyms: (obsolete) dedecorous, indecorous, <span class="searchmatch">undecorous</span> 1791 (date written), Mary Wollstonecraft, “Animadversions on Some of the...