| 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... |