unneedful

From Middle English unnedeful; equivalent to un- +‎ needful.

unneedful (comparative more unneedful, superlative most unneedful)

1. Not needful.
   • 1907, William Hope Hodgson, The Boats of the "Glen Carrig"‎:

     At this, the men nearest unto the door came backwards in a surge, being put in sudden fear by reason of the Thing being so near; but the bo'sun held up a hand, bidding them, in a low voice, to make no unneedful noise.

   • 1916, Bertrand W. Sinclair, Big Timber‎:

     Again the donkey began to puff and quiver, the line began to roll up on the drum, and the big yarder walked up the slope under its own power, a locomotive unneedful of rails, making its own right of way.