What does 同封 mean?
同封 is a Japanese noun meaning “enclosure (e.g., in a letter)” in English. It is written as 同封 in kanji, どうふう in hiragana, and doufuu in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
彼女は小切手を同封して私に送ってくれた。
She sent me the enclosed check.