estuvieron envenenando
-they/you were poisoning
Preterite progressive ellos/ellas/ustedes conjugation of envenenar.

envenenar

Popularity
3,500+ learners.
Algunos han sufrido extensos trabajos dentales, con lo que surgieron viejos pliegues ocultos de infección, que estuvieron envenenando totalmente el sistema durante años, y finalmente, se han limpiado.
Some have undergone extensive dental work, finding old hidden pockets of infection that have been poisoning their entire system for years, and finally clearing them up.
Word of the Day
to flirt