Revile (5)
(Other definitions for abase that I've seen before include "Lower" , "Demean" , "Belittle, degrade" , "Humble (oneself)" , "what 11 [REPRIMANDS] are meant to do" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">revile</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for abuse that I've seen before include "Treat badly; insult" , "vilification" , "Vituperation" , "Exploit" , "Utter insults, attack in words" .)