漢字 (Kanji)
A Kanji alone has a distinctive japanese pronounciation. For example, 煙 is a chinese character for "smoke", but japanese say kemuri, which is strictly a japanese pronounciation. However, when this kanji is joined with others to imply a more complex concept (e.g: 煙害 ), the chinese (en) is used. In this example, engai, smoke-pollution. Furthermore, sometimes chinese kanji each have many different pronounciations. I can recommend you a site that really explores the kanji aspect. But let me just say it's better to stick with verbs, particles and grammar for now.
link to THE KANJI SITE
But you will all see those in my own classification now: (some stuff is missing I know, but start studying those)