烽ほう煙えん

noun

smoke signals

Historical term for smoke signals used in ancient warfare, often alongside beacon fires (狼煙).

See also: 狼煙

• 古こ代だい中ちゅう国ごくでは、烽ほう煙えんを使つかって敵てきの襲しゅう来らいを知しらせた。

  In ancient China, smoke signals were used to warn of enemy attacks.