けいかいせん【警戒線】
水位は警戒線を越えたThe water level has risen above the warning line.
けいかいたいせい【警戒態勢】
沿岸に警戒態勢が敷かれたPeople in the coastal area were put on the alert.警察はテロに備えて警戒態勢をとっているThe police are on...
けいかいもう【警戒網】
警戒網を張るlay a police cordon ((around an area))／block off ((an area))警戒網を破るslip through a police cordon
けいかいする【警戒する】
be cautious ((of, about))，guard ((against))，be on one's guard ((against))，be on the watch ((for)...
