Maybe the right sentence is جائعة
Yes, 'جوعانة' is when you say that she is very hungry, and 'جائعة' is when you just say that she is hungry.
why is Arwa spelt with that letter at the end? I've never seen that letter before ى
It's used to form "aa" (a long vowel "a") so أروى becomes "2arwaa"