disconcerting

adj

1. Tending to cause discomfort, uneasiness or alarm.

   “Even with a safety harness, losing one's grip that high up is disconcerting.”

   “"You must admit," he remarked, "that up to now our conversation has hardly proceeded along conventional lines. I am a complete stranger to you; another man who is a complete stranger to me speaks to you while we're at tea. You inform me that I shall probably have to kill him in the near future. The statement is, I think you will agree, a trifle disconcerting."”