“林” emphasizes the plants or trees in the area,while “森” underlines the density of the trees or plants in the area.Therefore,“森林” as a combination of “森” and “林” refers to a forest.As kanji originates from China,you can also read some ancient Chinese books such as 《诗》、《书》、《礼》、《易》、《乐了》、《春秋》if you want to know more about Kanji or 汉字（Hanzi ）in Chinese.