When you add -tion to the word complete , it changes to completion , which is a noun meaning “the act or state of being finished.”

From “complete” to “completion”

  • Complete is usually a verb (“to finish something”) or an adjective (“finished; whole”).
  • Adding the suffix -tion turns it into the noun completion , which names the result or process of completing something.
  • So in a sentence, you might say: “The completion of the project took three months,” instead of “We will complete the project in three months.”

What -tion usually does

  • The suffix -tion is a common English ending that forms nouns, often from verbs.
  • It typically expresses:
    • An action: creation (the act of creating)
* A process: _evaluation_ (the process of evaluating)

* A result or state: _completion_ (the state of being completed)

Spelling change: complete → completion

  • With verbs ending in -ete like complete , English usually drops the final e and changes the ending to -tion , giving completion.
  • This follows the same pattern as:
    • relate → relation
* _accommodate_ → _accommodation_

So, what happens when you add -tion to complete?
You create the noun completion , meaning the act, process, or state of finishing something.

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