-energy
The ending -ergie comes from the Greek ergon = work, work. Words with this ending denote a phenomenon that has to do with the size “work”, and less often with “work / effect”. Examples for this are:
- Anergy - energy that is no longer able to work
- Energy - the quantity that goes into (physical) work.
- Exergy - energy capable of working
- Synergy - working together
- Allergy - strange, unknown effect