| 1 | English | dialog | A conversation or other form of discourse between... |
| 2 | Middle English | dialog | A literary discussion or a work written as one;... |
| 3 | Old French | dialoge | — |
| 4 | Latin | dialogus | discussion, conversation, dialogue |
| 5 | Ancient Greek | διάλογος | conversation, dialogue |
| 6 | Ancient Greek | διαλέγω | I choose, gather, pick , select |
| 7 | Ancient Greek | δῐᾰ- | apart; through, across; through; in different... |
| 8 | Ancient Greek | διά | throughout |
| 9 | Proto-Indo-European | dwís | twice, doubly; in two |
| 10 | Proto-Indo-European | dwóh₁ | two |