The Greek letter and word Epsilon is pronounced phonetically as "EP-sih-lon" (or occasionally "EP-suh-lon" in American English, and "ep-SY-lon" in traditional British English). The primary syllable stress falls on the first syllable "ep" (rhyming with step), followed by a short "ih" sound (as in sit) and ending with "lon" (rhyming with don). Phonetically written in the International Phonetic Alphabet, it is commonly transcribed as /ˈɛpsɪlɒn/ or /ˈɛpsəlɑːn/, ensuring smooth and natural pronunciation across mathematical, scientific, engineering, and corporate contexts.