Εννοια

1. to cause (to be the reason something happens)
2. (obsolete) to cause (to be the reason something happens)
3. to happen, to occur, to befall (to take place or happen unexpectedly) [+dative = to whom] [+infinitive]
4. to happen, to occur (to take place with a specific frequency as the result of specific types of phenomena or laws)
5. to happen (to do on occasion)
6. to succeed; to work out