oc·cur 
(ə-kûr)
(ə-kûr)intr.v. oc·curred, oc·cur·ring, oc·curs
1. To take place; come about. See Synonyms at happen.
2. To be found to exist or appear: Copper deposits occur in the region.
3. To come to mind: The idea never occurred to me.
[Latin occurrere : ob-, toward; see OB- + currere, to run; see kers- in the Appendix of Indo-European roots.]