What does 甚だ mean?
甚だ is a Japanese noun meaning “very, greatly, exceedingly” in English. It is written as 甚だ in kanji, はなはだ in hiragana, and hanahada in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
彼はやたらに故事来歴に詳しいけれど、それが人生の役に立っているのかはなはだ疑問だね。
He has a great storehouse of knowledge about historical details but I seriously doubt that's of any use in life.