unwieldy, unmanageable -- (difficult to use or handle or manage because of size or weight or shape; "we set about towing the unwieldy structure into the shelter"; "almost dropped the unwieldy parcel")
unmanageable, difficult -- (hard to control; "a difficult child", "an unmanageable situation")
uncontrollable, unmanageable -- (difficult to solve or alleviate; "uncontrollable pain")
uncontrollable, uncorrectable, unmanageable -- (incapable of being controlled or managed; "uncontrollable children"; "an uncorrectable habit")