Is 'confirm' a real English word?

Analysis Reasoning

'Confirm' is a standard English verb meaning to establish the truth, accuracy, or validity of something, to corroborate or verify, or to make firm or certain, as defined consistently across major dictionaries.

Cited Sources

• 01
  Dictionary.com

  https://www.dictionary.com/browse/confirm

• 02
  Merriam-Webster

  https://www.merriam-webster.com/dictionary/confirm

• 03
  Cambridge Dictionary

  https://dictionary.cambridge.org/us/dictionary/english/confirm