unclear
Byzantine
arcane
baffling
bewildering
bothering
complex
complicated
confounding
confusing
convoluted
cryptic
discomposing
disconcerting
dismaying
distracting
disturbing
embarrassing
enigmatic
flabbergasting
impenetrable
incomprehensible
intricate
involved
knotty
labyrinthine
mysterious
mystifying
obscure
paradoxical
perturbing
problematic
puzzling
recondite
riddling
sphinxlike
stupefying
troublesome
twisted
unfathomable
upsetting
annexing
flexing
vexing