| 极 |
jí zhóu | polar axis (x-axis in polar coordinates) |
| 极 |
jí | extremely / pole (geography, physics) / utmost / top |
| 轴 |
zhóu | axis / axle / spool (for thread) / roller (for scrolls) / classifier for calligraphy rolls etc |
| 轴 |
zhòu | used in 压轴 / Taiwan pr. [zhou2] |