From un- + assiduous. <span class="searchmatch">unassiduous</span> (comparative more <span class="searchmatch">unassiduous</span>, superlative most <span class="searchmatch">unassiduous</span>) Not assiduous....
carried a connotation of servility. assiduity assiduously assiduousness <span class="searchmatch">unassiduous</span> English terms derived from the Proto-Indo-European root *sed- (0 c, 67...