Namaste all,

We know that the first word of Ishavasya Upanishad is īśā(ईशा) meaning 'Lord' or 'Master'.Now,I don't understand why the long vowel ā(aa) is used.Isn't it the same as īśa(ईश ) ?Does the long vowel in īśā have any significance?Pardon my Sanskrit,I don't have much knowledge on how grammar works I hope members here can help me on this issue.


Best wishes,
A.