Refine (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">refine</span>' is the definition.<br/ ><span class="explanation-format__explanation">(hone can mean to refine or improve)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for hone that I've seen before include "Sharpen tool on stone" , "Polish" , "Sharpen (a blade)" , "Strop" , "Smooth stone" .)
(Other definitions for rarefy that I've seen before include "Make thinner" , "Thin" , "Make less solid; a ferry (anag.)" , "To make less dense" , "Fry are (anag.)" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">refine</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that refine is a more specific form of purify)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for purify that I've seen before include "Remove contamination from" , "Purge" , "Free from guilt" , "Clean" , "Remove contaminants from (something)" .)