had congealed
Pasado perfecto del verbo congeal. Hay otras traducciones para esta conjugación.

congeal

But instead of turning down the radio, which was giving out some popular music which had congealed into harmlessness, they waited until Daniel had withdrawn to his office again.
Pero en lugar bajar el volumen de la radio, que, inofensiva, emanaba una anquilosada música popular, esperaron hasta que Daniel se hubo retirado a su oficina.
Palabra del día
el reno