This is the 11499th most frequent Turkish word.
etmesinler
"Let them not do (it)."
Here, 'etmesinler' is used in a formal or polite request suggesting an action should not be done by others.
Lütfen bir hata etmesinler.
Please let them not make a mistake.
In this example, 'etmesinler' forms part of a purpose or intent statement, aiming to prevent an action.
Yanlış bir karar etmesinler diye düşündüm.
I thought so that they would not make a wrong decision.
The word 'etmesinler' is applied here as a direct request or suggestion for certain behavior to be avoided.