حامد جباری

under the circumstances =because of the conditions, e. g. It’s not an ideal solution, but it’s the best we can do under the circumstances.

under your breath =to say sth quietly, e. g. “Idiot!” He muttered under his breath

under no circumstances =not for any reason, e. g. Under no circumstances should you go out alone.

come under 1 e. g. Come under my umbrella

come under 2 =to suddenly experience, e. g. Our soldiers have come under some heavy artillery attacks overnight.