disconcerting (adj.)

• alarming
• awing
• awkward
• baffling
• chilling
• confounding
• confusing
• crushing
• daunting
• defeating
• deterrent
• discouraging
• disheartening
• dismaying
• disquieting
• disturbing
• embarrassing
• enigmatic
• fearful
• fearsome
• frightening
• frightful
• frustrating
• humiliating
• intricate
• mortifying
• mysterious
• mystifying
• perplexing
• perturbing
• problematic
• puzzling
• scary
• startling
• upsetting