ㄓㄣˋㄍㄜㄉㄞˋㄉㄢˋzhèngē‑dàidàn

zhěngē‑dàidànㄓㄣˇ ㄍㄜ ㄉㄞˋ ㄉㄢˋ
  1. 武器等待形容時時警惕不敢輕易安睡隨時迎戰心理準備 戰爭將士枕戈待旦準備迎戰」。

to keep one's spear by the pillow and await the dawn (idiom)​; ready for battle, determined to kill the enemy, Be prepared!
Gewehr bei Fuß stehen