What does 大いに mean?
大いに is a Japanese noun meaning “much, considerably (same as 大変 (たいへん)), greatly” in English. It is written as 大いに in kanji, おおいに in hiragana, and ooini in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
私は彼を大いに尊敬しています。
I have a great regard for him.