Disconcerting (adjective)
Tending to cause discomfort, uneasiness or alarm.
“unsettling|troubling|upsetting”
“Even with a safety harness, losing one’s grip that high up is disconcerting.”
Concerning (adjective)
Causing concern; worrisome.
Concerning (adjective)
Important.
Concerning (preposition)
Regarding, respecting.
Concerning (verb)
present participle of concern
Concerning (noun)
That which one is concerned in; one’s business.
Disconcerting (adjective)
causing one to feel unsettled
“he had a disconcerting habit of offering jobs to people he met at dinner parties”
Concerning (preposition)
on the subject of or in connection with; about
“we are given little information concerning matters of national security”
Concerning (adjective)
causing anxiety; worrying
“I find many of the comments very concerning”
“a concerning breach of security”