Answer:
I go up when the rain comes down. What am I?
I begin with the letter āiā, if you add āaā in front of me, I become a new word with a different meaning, but still sounds exactly the same. What word am I?
I am shared by goats devils and unicorns.
I let water fall on you while everyone else stays dry.
Everyone has me, but nobody can lose me. What am I?
No matter how little or how much you use me, you change me every month.