adj.

exacting; exhaustible; debilitating (debilitating disease scherfas); ding-dong (ssn); all out; onerous (bigmaxus); energy-sapping (Alexey Lebedev); difficult; demanding (Min$draV); debilitating (a debilitating condition/disease/illness

merriam-webster.com • The symptoms can be debilitating Alexander Demidov); weary (Sergei Aprelikov); exhausting; fatiguing; back-breaking; backbreaking ((of a task etc.) very difficult or requiring very hard work • Digging the garden is a backbreaking job); wasting (о болезни); tiring; wearisome; gruelling (exhausting • a gruelling race); all-out; tiresome; hard (Sergei Aprelikov); energy draining (VLZ_58); arduous (george serebryakov); strenuous (Abysslooker); grueling (напр, climb, race, etc Olga Okuneva); hectic; hectical; languishing; draining (MargeWebley); punishing (син. exhausting; напр. punishing climate Vadim Rouminsky)

back-breaking (о работе)

consumptive (напр., о болезни)

изнурительный

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