Om A Ra Pa Ca Na Dhih

Deity:

Manjushri

Usage:

Wisdom

Meaning:

The individual syllables A RA PA CA and NA have no translatable meaning. They are syllabary and are believed to have symbolic connections with different spiritual qualities.

From the "Large Sutra of Perfect Wisdom" (adapted from Conze):

A - Leads to the insight that the essence of all things is unproduced.
RA - Leads to the insight that all things are pure and free of defilements.
PA - Leads to the insight that all dharmas have been "expounded in the ultimate sense."
CA - Leads to the insight that the arising and ceasing of things cannot be apprehended because in reality there is no arising of ceasing.
NA - Leads to the insight that although the names for things change the nature of things behind their names cannot be gained or lost.
DIHI - This is often defined as “prayer” or “understanding” or “reflection.”

These are all important concepts in the Perfection of Wisdom.