had been tooling

• 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 tool.
  tool

  noun

  an implement, especially one held in the hand, as a hammer, saw, or file, for performing or facilitating mechanical operations.

Related Words

• apparatus
• appliance
• device
• engine
• gadget
• gizmo
• machine
• means
• mechanism
• utensil
• weapon