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The cherubim have four faces - a lion on the right, an ox on the left, a human forward, and an eagle backward. They have four wings, with HANDS under the wings, their legs described as simply "straight", and they have hooves. Also, the eyes. Everywhere. Even in the spaces between the eyes. Furthermore, the exact meaning of "Cherubim" has been lost to time but upon observing a group of abnormal "Chayyot", "living creatures", Ezekiel is surprised by the revelation of them being Cherubim. This means, in the eyes of the Hebrews, their most outstanding characteristic amongst the other orders of angels was that they are alive.
Contrast the Seraphim, basically cherubim with extra wings that are on fire, whose name means "Fiery Ones", and the Ophanim that take this to the extreme, being wheels intersecting themselves while turning, also flying with six wings, somehow attached while they're turning, whose name means "Wheels". Remember, neither of these were understood to be alive by the Hebrews. Add to all this that God's guard for the Garden of Eden was a cherub armed with a flaming sword that turned in all directions. There's a reason angels would address humans with "be not afraid" or just come in human form.
Seraphim are also described as dragon/serpent like (which led some experts to believe that they are loosely based on the goddess Wadjet from Egyptian mythology, which is also a fiery snake). They consistently have six wings, and one of them is used to cover their feet. In spite of the fact that they are snake-like. Try figuring that one out. "Feet" is often used in biblical Hebrew as a euphemism for the genitals.
