| Subject | English | Spanish |
| gen. | dumping of rubbish is strictly forbidden | está terminantemente prohibido arrojar basuras |
| construct. | forbidden area | zona prohibida |
| phys.sc., el. | forbidden band | ancho de banda prohibida |
| phys.sc., el. | forbidden band | intervalo de banda |
| phys.sc., el. | forbidden band | anchura de la banda prohibida |
| el. | forbidden band | banda reservada |
| el. | forbidden band | banda prohibida |
| phys.sc., el. | forbidden band | separación energética |
| IT | forbidden character | carácter prohibido |
| automat. | forbidden-combination check | comprobación de combinaciones prohibidas |
| phys.sc., el. | forbidden energy gap | banda prohibida |
| phys.sc., el. | forbidden energy gap | intervalo de banda |
| phys.sc., el. | forbidden energy gap | anchura de la banda prohibida |
| phys.sc., el. | forbidden energy gap | separación energética |
| phys.sc., el. | forbidden energy gap | ancho de banda prohibida |
| gen. | forbidden fruit | fruta prohibida |
| earth.sc. | forbidden line | línea prohibida |
| earth.sc. | forbidden transition | transición prohibida |
| construct. | forbidden zone | zona prohibida |
| gen. | it is forbidden for persons under sixteen years of age to purchase tobacco | comprar tabaco está prohibido para menores de 16 años |
| gen. | it's forbidden to mention your uncle's name in this house | el nombre de tu tío es impronunciable en esta casa |
| gen. | parking is forbidden | se prohíbe aparcar |
| gen. | private ground where hunting is forbidden | vedado de caza |
| tech., met. | repairs and caulking intended to cover up defects are forbidden | las reparaciones y el parcheo destinados a enmascarar defectos estan prohibidos |
| transp. | shunting forbidden | maniobras prohibidas |
| transp. | switching forbidden | maniobras prohibidas |