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Use "covertly" in a sentence
"We could all begin covertly wiretapping each other."
"He slowed further, eyeing the labels covertly: DA-DE."
"They question why the military didn't resort to alternative methods, such as covertly sabotaging the ships 'motors, as it did with Lebanese boats carrying weapons shipments in the 1980s, or allowing the aid ships to quietly land in Gaza, as previous Israeli governments have done."