1. a trench;〔待避壕〕a dugout
    • 塹壕を掘る
    • dig trenches
    • 敵は強固な塹壕に立てこもった
    • The enemy was strongly entrenched.
  1. 塹壕戦trench warfare
    • 塹壕戦が何か月も続いた
    • We fought from the trenches for months.