The spelling of the word "EWRSTA" might seem confusing at first glance, but it follows the phonetic rules of the English language. The correct spelling of the word is /ɛr.stə/, which can be broken down into two syllables: /ɛr/ and /stə/. The first syllable is pronounced with the "er" sound, as in the word "her", while the second syllable is pronounced with the "stuh" sound, as in the word "must". So, "EWRSTA" is properly spelled as "ersta".