godan verb (-u)
shine on each other; shed light on each other
Describes two or more light sources or reflective surfaces illuminating one another. Often used poetically or in descriptive writing.
月と湖が照り合う夜だった。
It was a night when the moon and the lake shone on each other.
二つの灯台の光が遠くで照り合
The lights of the two lighthouses are shining on each other in the distance.