изтощителен означава в английски

consumptive▼(having a tendency to consume)
adjective
[UK: kən.ˈsʌmp.tɪv] [US: kən.ˈsʌmp.tɪv]

exhausting▼(Very tiring)
adjective
[UK: ɪɡ.ˈzɔːst.ɪŋ] [US: ɪg.ˈzɒ.stɪŋ]

gruelling▼(so difficult or taxing as to make one exhausted)
adjective
[UK: ˈɡruːəl.ɪŋ] [US: ˈɡruːəl.ɪŋ]

wearing▼(causing tiredness)
adjective
[UK: ˈweər.ɪŋ] [US: ˈwer.ɪŋ]