adj .
extremely demanding ; difficult ; requiring a great skill or care 매우 극단적으로 무리한 요구를 하는 ; 어려운 ; 대단한 기술이나 주의를 요하는

• The exacting math teacher subtracted points for even the most unimportant errors.
  아주 가혹한 수학 선생은 진짜 하찮은 실수라도 가차없이 감점 처리했다.
• Weaving cloth out of guinea-pig air is an exacting occupation, because guinea pigs are small and their hair is short.
• The surgeon's exacting task was to reconnect the patient's severed eyelashes.