The word "MILBETA" is spelled as /mɪlbeɪtə/. It is composed of five letters and two syllables. The first syllable is pronounced as /mɪl/ and the second syllable is pronounced as /beɪtə/. The letter "M" is pronounced as /m/, and "I" is pronounced as /ɪ/. "L" in "MIL" is pronounced as /l/, "/b/" in "BETA" is pronounced as /b/ and "/eɪtə/" in "BETA" is pronounced as /beɪtə/. Therefore, the spelling of the word "MILBETA" is a combination of its individual letters with distinct pronunciations that create meaning when read aloud.