IPA: /ɪɡˈzæktɪŋ/
KK: /ɪɡˈzæktɪŋ/
This word describes someone or something that demands a lot of effort, care, or attention, often in a strict or severe way.
The exacting teacher expected all of her students to submit their best work.
Exacting → It is formed from "ex-" (meaning out of or from) and "agere" (meaning to drive or to do). The word "exacting" refers to demanding a lot from someone, as if driving them to give their best effort.
Think of someone who is 'driving' ('agere') you to give your best 'out of' ('ex-') you — that's why exacting means demanding.