| 1 | English | mouth | The opening of a creature through which food is... |
| 2 | Middle English | mouþ | Alternative form of mouth |
| 3 | Old English | mūþ | mouth, opening, door, gate |
| 4 | Proto-West Germanic | *munþ | — |
| 5 | Proto-Germanic | munþaz | mouth |
| 6 | Proto-Indo-European | men- | to think, mind; spiritual activity; to stay,... |