So or thus (3)
I believe the answer is:
sic
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">so</span>' is the first definition.<br/ ><span class="explanation-format__explanation">('sic' is 'so' in Latin)</span><br/ ><br/ >'<span class="explanation-format__original">thus</span>' is the second definition.<br/ ><span class="explanation-format__explanation">('thus' in Latin)</span><br/ ><br/ ></span>
(Other definitions for sic that I've seen before include "Urge to attack" , "(Of quoted word) exactly so" , "Intentionally so written" , "Printing term to denote accuracy though it appears otherwise" , "It calls attention to a quoted mistake" .)