| 地 |
dì sù | groundspeed (of an aircraft etc) |
| 地 |
de | -ly / structural particle: used before a verb or adjective, linking it to preceding modifying adverbial adjunct |
| 地 |
dì | earth / ground / field / place / land / CL:片 |
| 速 |
sù | fast / rapid / quick / velocity |