crux
Concise Oxford English Dictionary © 2008 Oxford University Press:
crux /krʌks/
▶noun (pl. cruxes or cruces /ˈkruːsiːz/) (the crux) the decisive or most important point at issue.
■ a particular point of difficulty.
– origin C17: from L., lit. ‘cross’.
'crux' also found in these Oxford entries:
cross
- cruces
- crucial
- cruciate
- crucible
- crucifer
- cruciferous
- cruciform
- crucify
- crusade
- excruciate
- nub
- Rosicrucian
