EA. Diphthong: a compound vowel. This one is deceased, we don’t use it any more. What did EA sound like? Maybe like EO, maybe like AU, emphasis on the E or the A because all Old English diphthongs fall down dead in the end: you pronounce both letters but not equally, let the second one drop away to its death, thirty two feet per second per second.
Maybe EA sounds like the E in second. Maybe EA sounds like ÆA, like a hybrid of what A is doing in gnaw and in mad. More like gnaw, but it’s still pissed off. Or it was, EA is dead and gone now, some sounds die. They get eaten up, don’t be mad about it. What chewed EA away? Everything is temporary.