The inaccessible, the unfathomable. Literally a fort or a place that is protected and thus difficult to reach.
A name for
Parvati, the consort of
Shiva.
Durga
symbolism.
Durga
yantra.
See also
Wikipedia.
108 names for Durga:
you-tube
At Navrati she is worshipped as
Navadurga