The spelling of the word "Arnaa" can be a bit confusing since it doesn't follow the standard English patterns. The correct pronunciation is [ɑɹnə], with the stress on the first syllable. The letter "a" in the first syllable is long and pronounced as "ah" like in the word "car". The second syllable is pronounced with a neutral vowel "uh". Although the origin and meaning of the word "Arnaa" is unclear, proper pronunciation can ensure effective communication.