TIRELESS Meaning of TIRELESS in English tireless BrE AmE ˈta ɪ ‿ə ləs -lɪs AmE \ ˈtaɪ‿ ə r ləs▷ tireless|ly li▷ tireless|ness nəs nɪs Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012