From Longman Dictionary of Contemporary Englishon bended knee(s)on bended knee(s)old-fashionedADMIRE in a way that shows great respect for someone → knee
Examples from the Corpus
on bended knee(s)• And they vote and they vote and the politicians come on bended knees.• Oh ... I am looking for a people who will come on bended knee.• We need not crawl on bended knees.• No human being who wants to read and own a book should ever have to go on bended knee to get it.• I bet you beg for it on bended knees!• Perhaps it was all of that singing on bended knees or from seated positions. 