Under oath
Having taken a formal oath (solemn promise).The man was under oath when he spoke before the judge.
Under fire
Being shot at or attacked physically, being attacked verbally.The soldiers were under fire during the battle.
Under cover
Hidden, concealed.The police officer was under cover during the robbery.
Under control
Not out of control, manageable.The fire was under control after the fire department arrived.
Under construction
Being built or repaired.The hotel was still under construction, two years after it began.
Under (close) scrutiny
Being watched or examined closely.The business owner was under scrutiny after the accounting scandal.
Under certain conditions
Depending on or influenced by specific conditions.The mountain road is closed under certain conditions.
Under certain circumstances
Depending on or influenced by specific circumstances.Under certain circumstances the children can practice in the indoor stadium.
Under attack
Being shot at or attacked physically, being attacked verbally.The company president is under attack because of the scandal.
Under arrest
Arrested by the police before being charged with a crime.The three men were under arrest for robbing a bank.