red flag

危険信号に用いる赤い旗

red flag の類語

traffic light, signal, alarm, semaphore, stop light, red light, high sign, green light, traffic signal, signal flag, signal tower, white flag, bell, police whistle, roman candle, buoy, rocket, go light, signal light, glance, warning sign, blinker, blue peter, beacon, warning signal, foghorn, signal post, flare, signal fire, signal shot, danger sign, sign, signal gun, wink, touch, yellow flag, signal bell, pilot flag, fog signal, signal rocket, kick, wigwag, nudge, signal lamp, caution light, amber light, aid to navigation, sailing aid, international alphabet flag, quarantine flag, fog whistle, the wink, marker beacon, signal mast, signal siren, signal gong, parachute flare, leer, watch fire, bell buoy

例文

• It raises a red flag for businessmen.
  それは実業人にとって一つの赤信号になる。

red flag の言い換えを探すには

red flag（危険信号に用いる赤い旗）の類語・言い換え（パラフレーズ）を、日本語訳つきで関連度順に並べています。英作文の語彙を増やしたいとき、長文読解で本文と選択肢の言い換えを見抜きたいときに使えます。