One of the commandos mistakenly threw a grenade into the room where she was being held hostage.
We could say we were approached by a local bad guy with a grenade in his hand.
“They have explosives, some type of grenade,” a cop said on the radio at one point.
"small explosive shell," 1590s, earlier "pomegranate" (1520s), from Middle French grenade "pomegranate" (16c.), earlier grenate (12c.), from Old French pomegrenate (influenced by Spanish granada); so called because the many-seeded fruit suggested the powder-filled, fragmenting bomb, or from similarities of shape. See pomegranate.