Enfeeble (6)

I believe the answer is:
weaken
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">enfeeble</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that enfeeble is a more specific form of the action weaken)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for weaken that I've seen before include "flag" , "Become less strong" , "Lessen the strength of" , "Lose force" , "Reduce in strength" .)