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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.”
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Disconcerning (adjective)
Concerning; disconcerting.
Wiktionary
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Disconcerting (adjective)
causing one to feel unsettled
“he had a disconcerting habit of offering jobs to people he met at dinner parties”
Oxford Dictionary