月つきの剣つるぎ

noun

new moon; crescent moon

Poetic and archaic term for a new or crescent moon, literally 'moon's sword'. Not used in modern everyday speech; found in classical poetry and literary contexts.

• 古こ歌かに「月つきの剣つるぎ」と詠よまれたのは、細ほそい三み日か月づきのことだ。

  In old poems, 'tsuki no tsurugi' refers to a thin crescent moon.