WordNet sense 1 (difficult to handle or manage especially because of shape):

bunglesome

WordNet sense 2 (difficult to use or handle or manage because of size or weight or shape):

unwieldy

WordNet sense 3 (lacking ease or grace):

wooden

WordNet sense 4 (lacking grace; clumsy):

ungraceful

WordNet sense 5 (lacking grace in movement or posture):

clumsy, clunky, gawky, ungainly

WordNet sense 6 (not elegant or graceful in expression):

cumbersome, inapt, inept, ill-chosen

WordNet sense 7 (hard to deal with; especially causing pain or embarrassment):

embarrassing, sticky, unenviable

WordNet sense 8 (not easy; requiring great physical or mental effort to accomplish or comprehend or endure):

difficult, hard

WordNet sense 9 (not suited to your comfort, purpose or needs):

inconvenient

WordNet sense 10 (not at ease socially; unsure and constrained in manner):

uneasy

WordNet sense 11 (conducive to or feeling mental discomfort):

uncomfortable