Where does “groundspeed” come from?
groundspeed (English) comes from English Speed, from Middle English sped, from Old English spēd, from Proto-West Germanic spōdi, from Proto-West Germanic spōan, from Proto-Germanic spōaną, from Proto-Indo-European spéh₁-, from Proto-Indo-European speh₁- — to succeed, to prosper.
groundspeed (English): The horizontal speed of an aircraft relative to...
Definitions
- The horizontal speed of an aircraft relative to...
Ancestry of “groundspeed”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | English | Speed | — |
| 2 | Middle English | sped | good fortune |
| 3 | Old English | spēd | success; luck, prosperity, success |
| 4 | Proto-West Germanic | spōdi | hurry, rush; success, prosperity |
| 5 | Proto-West Germanic | spōan | to succeed, prosper |
| 6 | Proto-Germanic | spōaną | to prosper, succeed, be happy |
| 7 | Proto-Indo-European | spéh₁- | — |
| 8 | Proto-Indo-European | speh₁- | to succeed, to prosper |