This meant nothing to Nero

I believe the answer is:
nihil
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">this meant nothing to nero</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nihil that I've seen before include "'... obstat' - Catholic imprimatur or approval" , "Nothing (Latin)" , "love" .)