nyctegretos
From LSJ
μέγα βιβλίον ἴσον τῷ μεγάλῳ κακῷ → a big book is the same as a big bad | a big book is the same as a big pain | a big book is a big evil | big book, big bad
nyctēgrĕtos: i, f., or -on, i, n., = νυκτήγρετον,
I a plant that shines by night, Plin. 21, 11, 36, § 62.