-I was hardening
The word endurecía is the imperfect form of endurecer in the first person singular. There are other translations for this conjugation.
See the full endurecer conjugation


Cuando el trabajo se endurecía, pasaba el tiempo con él y su familia.
When the job got tough, I spent time with him and his family.
La propuesta inicial de la Comisión ya endurecía considerablemente las nuevas medidas contra la contaminación acústica, puesto que definía como obligatorios estos valores límite opcionales.
I would point out that the measures to counter noise pollution are already tightened up considerably in the Commission's original proposal, because we are making the optional limit values binding.
El Consejo solo llegó a un acuerdo sobre su posición común porque creyó que una directiva que, aunque incluía una excepción, también endurecía la normativa y permitía la competencia en un mercado único, era mejor que no disponer de ninguna directiva.
The Council was able to agree its common position only because it felt that a directive, which included a waiver but tightened regulation and permitted competition in a single market, was better than no directive at all.
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