This is the 13048th most frequent Spanish word.
plegarse
To submit, yield, or conform to something.
The verb 'plegarse' is used figuratively here to mean 'submit or conform oneself to'.
Al final, él decidió plegarse a las normas del grupo.
In the end, he decided to submit to the group's rules.
Here, 'plegarse' denotes the literal action 'to fold' or 'bend', generally applied to flexible materials.
La tela se puede plegar fácilmente para guardarla.
The fabric can be folded easily for storage.
In this context, 'plegarse' is metaphorically used to indicate 'to adapt or to submit to' circumstances.