IPA: /ˌkɑːr.bəˈneɪ.ʃən/
KK: /kɑrˈboʊneɪʃən/
The process or state of having carbon dioxide gas mixed into a liquid, which creates bubbles and fizz.
The carbonation in the soda made it refreshing and bubbly.
Carbonation is formed from "carbon" (from Latin "carbo", meaning coal or charcoal) and "-ation" (meaning the process of). The word refers to the process of dissolving carbon dioxide in a liquid, typically to create a fizzy effect.
Think of 'carbon' as the element that creates bubbles in drinks, and '-ation' as the process — carbonation is the process of making a drink fizzy with carbon.