is countersigning

• present progressive

  present progressive

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

  of countersign (3rd person singular).
  countersign

  noun

  a sign used in reply to another sign.

More Suggestions

• countersign
• countersink
• counterstain
• undesigning
• counter-ion
• counterlight
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• counterrotating
• countersignature