無む題だい

noun which may take the genitive case particle 'no'

untitled; without a title; no subject (email)

Describes a work, message, or item that has no title. Common in art, music, and email contexts.

• この曲きょくは無む題だいのまま発はっ表ぴょうされた。

  This piece was released untitled.

• 無む題だいのメールは迷めい惑わくメールと間ま違ちがえられやすい。

  Emails with no subject are easily mistaken for spam.