the world > action or operation > difficulty > types of difficulty > [adjective] > difficult or intractable (of things) > by reason of extent (2)
Difficult to control, guide, move, manipulate, etc., by virtue of size, shape, or weight; clumsily massive, awkwardly large; unmanageable.
Difficult to control, manage, or use; = unwieldy, adj. 3. Also: †incapable of moving with ease; clumsy, ponderous; = unwieldy, adj. 2a (obsolete).