This is the 1191st most frequent Spanish word.
pudieron
"Could" or "were able to" (third person plural preterite of "poder").
The word 'pudieron' is used to indicate that they had the ability or possibility to complete the project successfully.
Ellos pudieron terminar el proyecto a tiempo.
They were able to finish the project on time.
Here, 'pudieron' (in its negative form) shows that the children lacked the ability due to external circumstances.
Los niños no pudieron llegar al parque debido a la lluvia.
The children couldn't reach the park due to the rain.
In this context, 'pudieron' signifies the successful completion of reaching mutual understanding.