| Subject | English | Basque |
| environ. | diffuse pollution Pollution from widespread activities with no one discrete source, e.g. acid rain, pesticides, urban run-off etc. | poluzio barreiatu |
| math. | diffuse prior | barreiatua aurretik |
| environ. | diffuse source Pollution which arises from various activities with no discrete source | jatorri barreiatuko iturri |