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The Online Etymological Dictionary informs that the word “gratitude” comes from the Latin gratus(thankful, pleasing) and from the Proto-Indo-European gwere (to favor). Related terms include: agree, congratulations, graceful; gratis, gratuity, ingratiate. I agree that congratulations and even a gratuity should go to the internet for knowledge that comes gratis. My father worked as a janitor for the MTA. He…