How to Say "well into" in Spanish
The Spanish word for “well into” is “entrado” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
AdjectiveB1
a period of time

Examples
Ella es una mujer entrada en los cuarenta.
She is a woman well into her forties.
Estábamos en la noche bien entrada cuando llegaron.
We were deep into the night when they arrived.
El hombre, entrado en años, se sentó a descansar.
The man, advanced in years (elderly), sat down to rest.
Adjective Agreement
As an adjective, 'entrado' must match the noun it describes in gender and number: 'entrada' (feminine singular), 'entrados' (masculine plural), 'entradas' (feminine plural).
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