وَاوُ الْحَالِ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – وَاوُ الْحَالِ is a particle

وَاوُ الْحَالِ	While	حَرْفٌ	وَاوُ الْحَالِ
Root	When	Particle	Particle of condition / Describes circumstance

Valuable resources:

وَاوُ الحَالِ occurrence