Plural of 'gramercy,' an archaic expression of gratitude or thanks, often exclaimed as 'grand mercy.'
From Old French 'grand merci' (great thanks), contracted into Middle English as a single word. The pronunciation shifted and it eventually became fixed as 'gramercy,' an obsolete but picturesque thank-you.
This word is basically Medieval English for 'thanks a million'—it's why Shakespeare used it all the time, and it perfectly captures how people would exaggerate gratitude with dramatic flair!
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