periphrasis
A grammatical term for expressing something in a roundabout way, using more words than necessary. Used in linguistics and rhetoric.
迂言法 refers to a rhetorical device of avoiding direct expression and speaking in a roundabout way.
From 迂 (roundabout) + 言 (word/speech) + 法 (method/rule). A Sino-Japanese compound likely coined as a translation of the Western rhetorical term 'periphrasis'.