This is the 11267th most frequent Spanish word.
envejecen
"They age" or "They grow old."
In this sentence, 'envejecen' refers to the process by which wines mature and improve their qualities over time.
Los vinos envejecen mejor en barricas de roble.
Wines age better in oak barrels.
Here, 'envejecen' is used to describe the natural process of growing older for people.
Las personas envejecen con el paso de los años.
People age with the passing of years.
In this instance, 'envejecen' is used to denote the deterioration or effect of time and conditions on materials.