gzhi ma grub pa

(basis or) foundation; isc. underlying basis [RB]

foundations, bases, origin, primary cause, source, elementary, fundamental root, rudiment, basis [JV]

fundamental basis, fundamental ground; root basis, root foundation, root source [RY]

root basis/ foundation/ source, ground and root [IW]

foundations, bases, origin, primary cause, source, elementary, fundamental root, rudiment, basis, bases & roots, base [JV]