IPA: /kənˈfɜːr.mə.ʃən/
KK: /kənˈfɜrˌmeɪʃən/
The act of verifying or proving that something is true or correct. It can also refer to a religious ceremony that admits a person into full membership in a church.
I received a confirmation email after booking my flight.
Confirmation → It is formed from "con-" (meaning together) and "firmare" (meaning to make firm or strengthen). The word "confirmation" refers to the act of making something firm or certain together with others, often in a formal context.
Think of coming together ('con-') to make something strong or certain ('firmare') — that's why confirmation means to make something certain.