• (adv.) Ignorantly; weakly. • (a.) Like a young person or thing; young; youthful. • (adv.) In a young manner; in the period of youth; early in life. Found on http://thinkexist.com/dictionary/meaning/youngly/
Young'ly adjective [ Anglo-Saxon geonglic .] Like a young person or thing; young; youthful. [ Obsolete] Shak. Found on http://www.encyclo.co.uk/webster/Y/7
Young'ly adverb 1. In a young manner; in the period of youth; early in life. [ Obsolete] Shak. 2. Ignorantly; weakly. [ R.] Found on http://www.encyclo.co.uk/webster/Y/7