exacting
adjectiveUK /ɪɡˈzæktɪŋ/
US /ɪɡˈzæktɪŋ/
Someone who is exacting wants everything to be done perfectly and will not accept anything less.
The exacting teacher checked every answer on our test twice.
OTHER MEANINGS
2. Requiring a lot of care, effort, or skill to do.
Building the tiny model ship was exacting work.
3. Making great demands on someone's time or energy.
Her exacting schedule left no time for rest.
4. Very careful and accurate in detail.
He kept exacting records of every penny he spent.