Purposeless
I believe the answer is:
adrift
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">purposeless</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for adrift that I've seen before include "Unanchored at sea" , "Not anchored, floating freely" , "'Directionless, floating freely (6)'" , "Afloat without control" , "Unsettled or unanchored" .)