Said it wrong, famously, in a 9th grade history presentation and embarrassingly learned the correct way:
1st syllable: short "e" (like in ten)... though many native speakers just slur it to "uh"... and millions of English language users from Latin derived language speaking countries will pronounce it like long "a" (as well as more long "o" on the 3rd syllable).
2nd syllable: pit (as in, "don't fall in that pit")
3rd syllable: uh (as in, "uhhh, Jack? I don't think you're saying that right.")... long "o" is okay to, but rarely fully pronounced in the saying.
4th syllable: me (as in "Who has a red face and wants to run away? Me, please.")