IPA: /ˌeɪdiˈæbətɪkli/
KK: /ˌeɪdiˈæbətɪkli/
In a manner that does not allow heat to enter or leave a system, often used in physics and thermodynamics.
The gas expanded adiabatically, resulting in a drop in temperature.
Adiabatically → It is formed from "adiabaticus" (from Greek "a-" meaning not and "diabatos" meaning passable) and the suffix "-ly" (meaning in a manner). The term describes a process in which heat does not pass into or out of a system, hence not allowing heat transfer.
Think of 'not passing' ('a-' means not and 'diabatos' means passable) to remember that 'adiabatically' refers to a process where heat does not pass in or out.