Expletive (5-4)
(Another definition for swear-word that I've seen is " Oath".)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">expletive</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for swearword that I've seen before include "Oath" , "profanity" , "blast perhaps" .)