threshold

umbral

Nivel que debe alcanzarse o superarse para que ocurra algo.

En inglés sencillo: The level that must be reached or passed before something happens.

• She has a high pain threshold.
• The temperature passed the threshold for opening the valve.
• Lower thresholds would cause more frequent warnings.

Cómo se usa: threshold for something (The threshold for an automatic warning is quite low.)

Sinónimos: limit, trigger point

Expresiones frecuentes: pain threshold, above the threshold, threshold for something, income threshold

umbral

Pieza de madera o piedra situada al pie de una puerta, que se pisa o se pasa por encima.

En inglés sencillo: The strip of wood or stone at the bottom of a doorway that you step over.

• He stepped over the threshold.
• A cat was sleeping on the threshold.
• The wooden threshold needs replacing.

Sinónimos: doorsill

Expresiones frecuentes: cross the threshold, on the threshold, step over threshold

umbral de pista

Punto de una pista donde empieza la zona que puede utilizarse para aterrizar.

En inglés sencillo: The point on a runway where the area used for landing begins.

• The aircraft passed over the threshold.
• White markings show the runway threshold.
• The pilot could see the threshold lights through the rain.

Expresiones frecuentes: runway threshold, displaced threshold, threshold lights