had been trenching

• past perfect progressive

  past perfect progressive

  Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.

  of trench.
  trench

  noun

  a long, narrow excavation in the ground, the earth from which is thrown up in front to serve as a shelter from enemy fire or attack.

Related Words

• dike
• foxhole
• gorge
• gully
• moat
• pit
• trough
• waterway