1. (vt) disuadir - fines do not deter people from not paying their fares: con multas no se consigue disuadir a la gente de que viaje sin pagar this failure will not deter me from trying again: este fracaso no hará que desista de volver a intentarlo to discourage

2. (vt) impedir - I couldn't deter her from leaving: no pude impedir que se fuera to prevent