ARDUOUS Meaning of ARDUOUS in English arduous BrE AmE ˈɑːd ju‿əs ˈɑːdʒ u‿ AmE \ ˈɑːrdʒ u‿əs▷ arduous|ly li▷ arduous|ness nəs nɪs Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012