Rain: rain, water falling from the clouds to the ground.
"Shuo Wen Jie Zi" explains the cloud: Water comes out from under the cloud. As the sky is like a cloud, water is idle. All rain belongs to rain.
Letter: it means letter and envelope, and it also means tolerance and tolerance.
"Shuo Wen Jie Zi" explains the cloud: awkward, tongue also.
Rain teaches ze, swift and rain dew; A letter means tolerance, broadness, tolerance and beauty.
The meaning of this name can be interpreted as: "Kakuzawa? Contain ". The idiom "Wind and rain adjust the dragon, Zhang Fengxin"