susurrarán
-they will whisper
The word susurrarán is the future form of susurrar in the third person plural.
See the full susurrar conjugation

susurrar

Uno puede buscar a lo largo y ancho del Mundo y descubrirá el vergonzoso hecho que solo unos pocos se esfuerzan hacia la realización de la Verdad y estos pocos solo susurrarán tímidamente acerca del Mundo Sutil.
One can search throughout the world and will discover the shameful fact that only a few strive toward the realization of Truth, and these few will only whisper timidly about the Subtle World.
Y de los 6000 idiomas, mientras estamos sentados aquí en Monterey, más de la mitad ya no se susurrarán a los oídos de los niños.
And of those 6,000 languages, as we sit here today in Monterey, fully half are no longer being whispered into the ears of children.
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