they radiated
-ont irradié
Past they conjugation of radiate.

radiate

Heinrich Hertz, when he discovered radio waves in 1887, he called them radio waves because they radiated.
Heinrich Hertz, quand il a découvert les ondes radio en 1887, les a appelées ainsi car elles rayonnent.
Indeed, those days radiated light: they radiated confidence in the value of life and in commitment to goodness.
Ce furent en effet des journées qui ont rayonné de lumière ; elles ont fait rayonner la confiance dans la valeur de la vie et dans l'engagement pour le bien.
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