सूक्ष्ममेकाक्षरं विद्यात्स्थूलं पंचाक्षरं विदुः । सूक्ष्ममव्यक्तपंचार्णं सुव्यक्तार्णं तथेतरत् ९ ।
The subtle one is of a single syllable where the constituent five syllables are not differentiated clearly. The gross one is of five syllables where all the constituent syllables are manifest.