Where does “SI” come from?
SI comes from French si, meaning "if," though its ultimate origin and semantic development remain uncertain.
SI (English): Initialism of signal integrity; Initialism of...
Definitions
- Initialism of signal integrity; Initialism of...
Ancestry of “SI”, step by step
SI traces back through two separate lines of ancestry.
via Middle English si
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | Middle English | si | — |
| 2 | Italian | sì | yes; so |
| 3 | Italian | bene | upper-class, posh, high; well, nicely, OK, right;... |
| 4 | Latin | bene | well; properly, exactly; agreeably, favorably |
| 5 | Latin | bonus | good, honest, brave, noble, kind, pleasant;... |
| 6 | Old Latin | duenos | Alternative form of duonus |
| 7 | Proto-Italic | dwenos | good |
| 8 | Proto-Indo-European | dew- | to show favour, revere; to fail, to lag, to be... |