omerta (n.) Look up omerta at Dictionary.com
1909, from dialectal form of Italian umilta "humility," in reference to the code of submission of individuals to the group interest, from Latin humilitas "lowness, small stature; insignificance; baseness, littleness of mind," in Church Latin "meekness," from humilis "lowly, humble," literally "on the ground," from humus "earth," from PIE root *dhghem- "earth."