arise - rise
Both arise and rise are irregular verbs. The other forms of arise are arises, arising, arose, arisen. The other forms of rise are rises, rising, rose, risen.
When an opportunity, problem, or situation arises, it begins to exist.
He promised to help Rufus if the occasion arose.
A serious problem has arisen.
When something rises, it moves upwards.
Several birds rose from the tree-tops.
If an amount rises, it increases.
Unemployment has risen sharply.
Their profits rose to $1.8 million.