偽ぎ書しょ

noun, noun which may take the genitive case particle 'no'

forgery; spurious document; apocryphal book

Refers to a document or book that is falsely attributed, forged, or of doubtful authenticity. Often used in historical, literary, or legal contexts.

• その古こ文ぶん書しょは偽ぎ書しょだと判はん明めいした。

  That old document turned out to be a forgery.

• 偽ぎ書しょの疑うたが