Where does “subdiagonal” come from?
subdiagonal (English) comes from English sub, from English substitute, from Middle English substituten, from Latin substitutus, from Latin substituo, from Latin statuo, from Latin stātus, from Latin stō.
subdiagonal (English): Said of an entry of a square matrix: that it lies anywhere in the lower triangular area below the main diagonal of the matrix
Definitions
- Said of an entry of a square matrix: that it lies anywhere in the lower triangular area below the main diagonal of the matrix
Ancestry of “subdiagonal”, step by step
subdiagonal traces back through two separate lines of ancestry.
via English sub
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | sub | A submarine; A submarine sandwich: a sandwich... |
| 2 | English | substitute | To use in place of something else, with the same... |
| 3 | Middle English | substituten | — |
| 4 | Latin | substitutus | substituted |
| 5 | Latin | substituo | I place next to, under, or instead of; I... |
| 6 | Latin | statuo | I set up, station; I establish, determine, fix; I... |
| 7 | Latin | stātus | fixed, set, having been set |
| 8 | Latin | stō | to stand |
| 9 | Proto-Italic | staēō | stand |
| 10 | Proto-Indo-European | sth₂éh₁yeti | to stand |
| 11 | Proto-Indo-European | *steh₂- | — |
via English diagonal
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | diagonal | Joining two nonadjacent vertices; Having slanted... |
| 2 | Middle French | diagonal | — |
| 3 | Latin | diagōnālis | diagonal |
| 4 | Ancient Greek | διαγώνιος | from angle to angle |
| 5 | Ancient Greek | δῐᾰ- | apart; through, across; through; in different... |
| 6 | Ancient Greek | διά | throughout |
| 7 | Proto-Indo-European | dwís | twice, doubly; in two |
| 8 | Proto-Indo-European | dwóh₁ | two |