The word "ASTRER" is not a commonly used word, making it a challenge for many to spell it correctly. However, the IPA phonetic transcription can help to make sense of its spelling. The word is pronounced as /æstrər/ where the initial letter "A" is pronounced as the vowel sound in "cat," followed by the consonant sound "s." The second syllable "tr" is typically pronounced as a combination of the consonant sounds "t" and "r." When pronounced together, the word sounds like "as-truh-rr."