| Subject | Spanish | English |
| fin. | acción de valor inestable | Volatile stock |
| meteorol. | aire inestable | unstable air |
| meteorol. | ambiente inestable | buoyant environment |
| el. | amplificador inestable potencialmente | potentially-unstable amplifier |
| el. | arco inestable | unstable arc |
| milk. | aroma inestable de la leche | unstabilized flavour of milk |
| meteorol. | atmósfera absolutamente inestable | absolutely unstable atmosphere |
| meteorol. | capa absolutamente inestable | absolutely unstable layer |
| meteorol. | capa condicionalmente inestable | conditionally unstable layer |
| meteorol. | capa estable sobre aire inestable | cap |
| meteorol. | capa húmeda absolutamente inestable | Moist Absolutely Unstable Layer |
| life.sc. | capa inestable | unstable layer |
| IMF. | capital inestable | volatile capital |
| med. | colon inestable | spastic colon (colon irritabile) |
| chem. | compuesto inestable | unstable compound |
| meteorol. | condiciones de tiempo inestable | unsettled weather |
| meteorol. | condiciones inestables | active weather |
| med. | diabetes inestable | labile diabetes |
| med. | diabetes inestable | brittle diabetes |
| earth.sc. | ebullición inestable | transition boiling |
| med. | enfermo que presenta una evolución patológica inestable de etiología variable | patient with disease patterns of varying aetiology |
| pack. | equilibrio inestable | unstable equilibrium |
| transp., nautic. | escora inestable | loll condition |
| reliabil. | estado inestable de una red de energía eléctrica | unstable state of an electric power system |
| CNC | estado inestable | unstable state |
| reliabil. | estado potencialmente inestable de una red de energía eléctrica | insecure state of an electric power system |
| reliabil. | estado potencialmente inestable de una red de energía eléctrica | potentially unstable state of an electric power system |
| chem. | Explosivo inestable. | Unstable explosives. |
| life.sc. | extremadamente inestable | extremely unstable |
| tech. | flujo inestable | unsteady flow |
| industr., construct., met. | fondo inestable | dropped punt |
| industr., construct., met. | fondo inestable | rock |
| industr., construct., met. | fondo inestable | rocker |
| industr., construct., met. | fondo inestable | rocker bottom |
| industr., construct., met. | fondo inestable | spinner |
| industr., construct., met. | fondo inestable | wobbler |
| industr., construct., met. | fondo inestable | sunken bottom |
| industr., construct., met. | fondo inestable | rocky bottom |
| industr., construct., met. | fondo inestable | dropped bottom |
| earth.sc., transp. | fuerzas aerodinámicas inestables | unsteady aerodynamic forces |
| meteorol. | gradiente térmico absolutamente inestable | absolutely unstable lapse rate |
| meteorol. | gradiente térmico condicionalmente inestable | conditionally unstable lapse rate |
| life.sc. | ligeramente inestable | slightly unstable |
| transp. | marcha inestable | uneven running |
| health. | marcha inestable | unsteadiness of gait |
| auto. | marcha inestable | rough idle |
| meteorol. | masa de aire inestable | unstable air mass |
| market. | mercado inestable | sensitive market |
| bank. | mercado inestable | unstable market |
| life.sc. | moderadamente inestable | moderately unstable |
| tech. | moneda de valor inestable | soft currency |
| commun. | oscilación inestable | instable oscillation |
| earth.sc. | oscilación inestable | unstable oscillation |
| meteorol. | perfil de temperatura de atmósfera inestable | unstable temperature profile |
| meteorol. | potencialmente inestable | potentially unstable |
| med. | regulación de la presión sanguínea dinámica inestable | unstable dynamic blood pressure regulation |
| life.sc., construct. | terreno inestable | unstable slope |
| chem., el. | terreno inestable | unstable ground |
| dialys. | tratamiento inestable | unstable treatment |
