am plumbing

• present progressive

  present progressive

  Used to describe an ongoing action or state that is currently taking place in the immediate present.

  of plumb (1st person singular).
  plumb

  noun

  a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line.

Related Words

• delve
• explore
• fathom
• penetrate
• unravel