Choler (3)
I believe the answer is:
ire
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">choler</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that choler can be written as ire)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ire that I've seen before include "heat" , "Choler" , "Anger, annoyance" , "'Anger, wrath (3)'" , "Strong emotion" .)