IPA: /ɪɡˈzækʃən/
KK: /ɪgˈzækʃən/
A demand for something, often in a way that is unfair or excessive.
The exaction of high fees for basic services angered the community.
Exaction is formed from "ex-" (meaning out of or from) and "agere" (meaning to drive or to do). The word refers to the act of demanding or taking something out from someone, often in a forceful manner.
Think of 'taking something out' ('ex-') and 'doing' something with it ('agere') — that's why exaction means demanding something.