1. in a manner that causes surprise, confusion, or mild distress; in a way that disturbs one's composure or confidence
Usage: common in formal and informal contexts; modifies verbs, adjectives, or entire clauses

Examples

• The test was disconcertingly difficult for a beginner-level course.
• She smiled disconcertingly, as if she knew something we didn't.
• The silence in the room was disconcertingly loud.
• His sudden change in behavior was disconcertingly abrupt.
• The news arrived disconcertingly late in the evening.
• The painting's colors were disconcertingly vivid and unsettling.
• He spoke disconcertingly fast, making it hard to follow his argument.