The word "Eesaia" is spelled using the International Phonetic Alphabet (IPA) as i.sia.ja. It is a transliteration of the Hebrew name יְשַׁעְיָהוּ (Yeshayahu), which means "salvation of God." In English, it is typically spelled as "Isaiah." The use of IPA helps to provide a standardized way of representing the sounds of words across different languages and dialects. By using IPA, it is easier to understand the pronunciation of words regardless of the written language used.