とおtooりかかるrikakaruとおtoorikaかるkaruとおtooriかかkakaru
1.

To pass by a location or person unexpectedly, often without a specific intention or purpose.

2.

To happen to encounter a place or someone while moving through an area, typically in a casual or unplanned manner.

3.

To come across something or someone incidentally while traveling or walking, suggesting an element of chance in the encounter.

Example:

すると、たまたま少女のおばあちゃんが通りかかる。