This is the 11404th most frequent Spanish word.
eternidad
Eternidad: Eternity; the state of infinite or unending time.
In this sentence, 'eternidad' is used in a philosophical context, referring to the notion of time without end.
La eternidad parece un concepto abstracto e infinito.
Eternity seems like an abstract and infinite concept.
Here, 'eternidad' is employed in a romantic manner, expressing unending devotion.
Prometió amarla por toda la eternidad.
He promised to love her for all eternity.
In this usage, 'eternidad' is metaphorical, portraying a long and tedious period exaggerated as endless.