disagree
Concise Oxford English Dictionary © 2008 Oxford University Press:
disagree/dɪsəˈɡriː/
▶verb (disagrees, disagreeing, disagreed)
- 1 have a different opinion.
- 2 (disagree with) be inconsistent with.
■ affect adversely: the sea crossing disagreed with her.
– derivatives
disagreement noun.
disagreement noun.
'disagree' also found in these Oxford entries:

