HARDEN Meaning of HARDEN in English harden BrE AmE ˈhɑːd ə n AmE \ ˈhɑːrd ə n▷ harden|ed d▷ harden|ing ‿ɪŋ▷ harden|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012