| 1 | Old French | paier | Alternative form of paiier |
| 2 | Latin | pacare | present active infinitive of pācō; second-person... |
| 3 | Latin | paco | I make peaceful, pacify, quiet, soothe; subdue; I... |
| 4 | Latin | pax | peace; rest, quiet, ease; grace |
| 5 | Proto-Italic | pāks | peace |
| 6 | Proto-Indo-European | péh₂ḱ-s | peace |
| 7 | Proto-Indo-European | peh₂ḱ- | to join, to attach; agreement, settlement |