1. Acetabulum, a little saucer for vinegar (acetum)] The cavity or depression on the lateral surface of the innominate bone (hip bone)

2. In Latin, there is a family of words related to acedia, such as acer (sharp, bitter), acetum (vinegar), and acerbum (harsh) which, taken figuratively, makes us think that the persons suffering from acedia have received a high dose of acidity, making them to be like vinegar.