The word renacía is the imperfect form of renacer in the first person singular. There are other translations for this conjugation.
See the full renacer conjugation

renacer

Saben, oyéndolos, sentí que renacía la esperanza.
You know, listening to you guys, I've got a glimmer of hope.
¡Y de pronto, era primavera, y todo renacía, y era mejor!
And then all of a sudden, there was spring, and everything came alive, and it was better!
Con ellos se sellaba definitivamente el Plan de Acción de Buenos Aires y renacía la confianza en el proceso del cambio climático.
They had set the final seal on the Buenos Aires Plan of Action and had restored confidence in the climate change process.
Con ellos se sellaba definitivamente el Plan de Acción de Buenos Aires y renacía la confianza en el proceso de negociación relativo al cambio climático.
They had set the final seal on the Buenos Aires Plan of Action and had restored confidence in the climate change negotiating process.
La lucha electoral entre Bonaparte y Cavaignac renacía bajo la forma de un duelo de peticiones en pro y en contra de la disolución de la Asamblea Nacional. Tales peticiones venían a ser un comentario adicional al 10 de diciembre.
The election struggle between Bonaparte and Cavaignac was renewed as a petition struggle for and against the dissolution of the National Assembly; the petitions were to be belated commentaries on December 10.
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