This noun refers to errors, mistakes, or inadvertent sins—wrongs committed unknowingly rather than deliberately. In Psalm 19:12, the psalmist asks to be cleansed from 'hidden errors,' contrasting them with presumptuous sins mentioned in the next verse. These are faults we don't recognize in ourselves, blind spots in our moral vision. Some textual traditions suggest reading this as related to the word for 'inadvertent sins' found in the sacrificial legislation. The concept acknowledges human fallibility—we sin not only willfully but also through ignorance, carelessness, or spiritual blindness.