STRENGTHEN Meaning of STRENGTHEN in English strengthen BrE AmE ˈstreŋ k θ ə n § ˈstren t θ- ▷ strengthen|ed d▷ strengthen|er/s ‿ə/z AmE ‿ ə r/z▷ strengthen|ing ‿ɪŋ▷ strengthen|s z Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012