Where does “back-spotface” come from?
back-spotface (English) comes from English back-, from Middle English bak-, from Middle English abak, from Old English onbæc, from Old English on, from Proto-West Germanic ana, from Proto-Germanic *an, from Proto-Germanic ana — on, onto.
back-spotface (English): To spotface from the backside of a workpiece by using a tool that passes through a through hole, deploys a cutting edge (or receives it by manual insertion from an operator), spotfaces the far side, retracts the cutting edge (or has it removed), and then retreats back through the hole (toward the to
Definitions
- To spotface from the backside of a workpiece by using a tool that passes through a through hole, deploys a cutting edge (or receives it by manual insertion from an operator), spotfaces the far side, retracts the cutting edge (or has it removed), and then retreats back through the hole (toward the to
Ancestry of “back-spotface”, step by step
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | back- | Back "in its adverbial senses"; Situated,... |
| 2 | Middle English | bak- | — |
| 3 | Middle English | abak | backward, away |
| 4 | Old English | onbæc | backwards, back |
| 5 | Old English | on | on, in, at, among; from |
| 6 | Proto-West Germanic | ana | on |
| 7 | Proto-Germanic | *an | — |
| 8 | Proto-Germanic | ana | on, at; on, onto; ana |
| 9 | Proto-Indo-European | h₂en- | on, onto |