selas
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
sĕlas: plur. sela, n., = σέλας>,
I a kind of fiery meteor, Sen. Q. N. 1, 15, 1; App. Mund. p. 64, 20.