Allegations
(n) a statement that someone has done something wrong or illegal, but that has not been proved
Audacious
(adj.) bold, adventurous, recklessly daring
Propriety
(n) the state of being proper, appropriateness; (pl) standards of what is proper or socially acceptable
Inexplicable
(adj.) Hard to explain or impossible to understand
Enigma
(n) a puzzle; a mystery
Pernicious
(adj.) extremely harmful; deadly, fatal
Implacable
(adj.) not to be satisfied or pacified; unyielding; incapable of being pleased
Immaculate
(adj) Perfectly clean, free from dirt or stain
Irrevocable
(adj.) incapable of being changed or called back
Mediocre
(adj.) average, ordinary, undistinguished