had concatenated

• past perfect

  past perfect

  Used to express a completed action that took place before another specific past action occurred.

  of concatenate.
  concatenate

  verb (used with object)

  to link together; unite in a series or chain.

More Suggestions

• concatenation
• hard-coated
• uncontaminated
• catenate
• concentrated
• concinnate
• indoctrinated
• self-conceited