were instrumenting

• past progressive

  past progressive

  Used to describe an ongoing action or continuous state that was happening at a specific time in the past.

  of instrument.
  instrument

  noun

  a mechanical tool or implement, especially one used for delicate or precision work.

Related Words

• apparatus
• appliance
• device
• equipment
• gadget
• gear
• gizmo
• machine
• machinery
• mechanism