bone of contention
Something that continues to be disputed; something on which no agreement can be reached.
It is still a bone of contention whether to go ahead with the original plan in light of the new evidence.
ADJ
main
The main contention between the two neighbors was about where to build the fence.
VERB + CONTENTION
support
The coach's contention that the referee made a wrong call was supported by video evidence.
reject
PREP
~ between
There has been some contention between the neighbors about where to build the fence.
PHRASES
an area of contention, a bone/point/source of contention
The best time to leave work each day became a point of contention between management and staff.