vyčerpávající angolul

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

strenuous▼(requiring great exertion)
adjective
[UK: ˈstre.njʊəs] [US: ˈstre.njuːəs]