| 1 | Polish | naradzić | — |
| 2 | Polish | radzić | to advise, suggest; to consult |
| 3 | Polish | rada | advice, counsel; council; board |
| 4 | Old Polish | rada | — |
| 5 | Old Church Slavonic | rada | — |
| 6 | Middle High German | rāt | — |
| 7 | Old High German | rāt | advice, council; advise |
| 8 | Proto-West Germanic | rād | advice, counsel |
| 9 | Proto-Germanic | rēdaz | advice, counsel |
| 10 | Proto-Indo-European | Hréh₁dʰos | — |
| 11 | Proto-Indo-European | Hreh₁dʰ- | to think; to arrange; to succeed, accomplish |
| 12 | Proto-Indo-European | h₂reh₁- | to think, reason; to arrange |
| 13 | Proto-Indo-European | h₂er- | to fit, to fix, to put together |