I've been mixing up masculine and feminine forms--in part, I think, because I learned Spanish before Hindi, and the -a ending in Spanish is feminine. In Hindi, it is masculine. To keep it all straight, these are the general forms (i.e., there are plenty of exceptions) for Hindi words.
|Masculine||-आ (-ā)||-ए (-e)|
|Feminine||-ई (-ī)||-इयाँ (-iyāṃ)|