同封どうふう Common Noun Irregular Transitive Noun English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru transitive verbnouns which may take the genitive case particle 'no' enclosing (e.g. with a letter) 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.