from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. Alternative spelling of co-occur.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. go with, fall together
Sorry, no etymologies found.
And compounding/prefixing/suffixing words has always led to pronunciations that aren’t what you’d expect: cooccur, baseball, modeled.