原
| Level 3 vocabulary | ||
| 原因 | (n) cause/ origin/ source/ (P) | |
| Level 2 vocabulary | ||
| 原稿 | (n) manuscript/ copy/ (P) | |
| 原産 | (n) place of origin/ habitat | |
| 原始 | (n) origin/ primeval/ (P) | |
| 原理 | (n) principle/ theory/ fundamental truth/ (P) | |
| 原料 | (n) raw materials/ (P) | |
| 原 | (n) field/ plain/ prairie/ tundra/ moor/ wilderness/ (P) | |
| Level 1 vocabulary | ||
| 原作 | (n) original work/ (P) | |
| 原子 | (n) atom/ (P) | |
| 原書 | (n) original document/ (P) | |
| 原則 | (n) principle/ general rule/ (P) | |
| 原点 | (n) origin (coordinates)/ starting point/ (P) | |
| 原典 | (n) original (text) | |
| 原爆 | (n) atomic bomb/ (P) | |
| 原文 | (n) the text/ original/ (P) | |
| 原油 | (n) crude oil/ (P) | |
| 高原 | (n) tableland/ plateau/ (P) | |
| 原っぱ | (n) open field/ empty lot/ plain/ (P) | |