The origin of the idiom "pay someone back in their own coin" can be traced back to the idea of currency or payment. In the past, coins were used as a form of payment, and each coin had a specific value. When someone paid one with a coin, one received exactly what was owed to one. Similarly, when one "pays someone back in their own coin," one is figuratively giving them back the same kind of treatment or behavior they have given one. It is typically used in situations where someone wants to retaliate or respond to another person's actions, words, or behavior by using similar tactics or treatment that they have received.

What is the origin of the idiom "pay someone back in their own coin" and when to use it?

c71c209bac38ffbf6c4a97e98c8a74c801094bf27618250db349f837dc5ddf81

to [pay] {sb} back in {one's} own (coin|crown)

https://tts.langeek.co/read?text=dG8gcGF5IHNvbWVib2R5IGJhY2sgaW4gb25lJ3Mgb3duIGNvaW4&hash=9ad7428a993f342ce40d2e314e9ee39d257047e5&lang=en&cache-only=0&driver=googletts

Định nghĩa và ý nghĩa của "pay somebody back in one's own coin"trong tiếng Anh

Download Mobile App