プログレッシブ和英中辞典(第4版)の解説
けいかい【警戒】
〔用心〕caution, precaution ((against))
警戒する be cautious ((of, about))，guard ((against))，be on one's guard ((against))，be on the watch ((for))；〔監視する〕look out, watch out ((for))
警戒して
〔慎重に〕cautiously／〔念のため〕by way of precaution
彼の右フックを警戒しろ
You've got to watch out for his right hook.
甘い話には警戒しなさい
Beware of tempting proposals [offers].
彼らはインフレを警戒している
They are on their guard against inflation.
彼の巧みな言葉につられて警戒を緩めてしまった
His smooth words put me off my guard.
再発の兆候を警戒する
be on the watch for signs of recurrence
組合の動向を警戒する
keep 「an eye [a watch] on movements in the labor union
どんな小さな音にも警戒を怠らなかった
He was alert to the faintest sound.
警戒警報
a precautionary warning
警戒警報が出た
There has been a preliminary warning.
警戒色
warning coloration
教師たちは校内暴力に対して警戒色を強めている
The teachers are 「growing increasingly wary of [redoubling their precautions against] school violence.
警戒心
wariness
とても警戒心が強い
He is extremely cautious.
警戒信号
a caution [warning] signal
警戒線
水位は警戒線を越えた
The water level has risen above the warning line.
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 the alert against terrorist activity.
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