Latin word wardo comes from Proto-Indo-European *wrū-, and later Proto-Germanic *warduz (Guard.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *wrū- | Proto-Indo-European (ine-pro) | |
| *warduz | Proto-Germanic (gem-pro) | Guard. |
| *wardāną | Proto-Germanic (gem-pro) | To guard, protect, watch over. |
| *wardōn | Frankish (frk) | To guard, protect, watch over. |
| wardo | Latin (lat) | (Medieval Latin) I guard. (Medieval Latin) I herd cattle. (Medieval Latin) I ward against. |