| 1 | German | Bundesrat | A federal council, "especially:" the federal... |
| 2 | German | rät | third-person singular present of raten |
| 3 | Middle High German | rāt | — |
| 4 | Old High German | rāt | advice, council; advise |
| 5 | Proto-West Germanic | rād | advice, counsel |
| 6 | Proto-Germanic | rēdaz | advice, counsel |
| 7 | Proto-Indo-European | Hréh₁dʰos | — |
| 8 | Proto-Indo-European | Hreh₁dʰ- | to think; to arrange; to succeed, accomplish |
| 9 | Proto-Indo-European | h₂reh₁- | to think, reason; to arrange |
| 10 | Proto-Indo-European | h₂er- | to fit, to fix, to put together |