ansträngande znamená v Angličtina

arduous▼(needing or using up much energy)
adjective
[UK: ˈɑː.djuəs] [US: ˈɑːr.dʒuːəs]

trying▼(Difficult to endure; arduous)
adjective
[UK: ˈtraɪ.ɪŋ] [US: ˈtraɪ.ɪŋ]