The MacBook can neither accept nor deny the password. Its the Wi-Fi router that does this verification and that tells the MacBook wether the supplied password is correct or not.
Check that the password you are entering is correct for the router you are trying to connect to.
Make sure you have chosen the correct Wi-Fi network for the password you have.
If possible, reset the Wi-fi router and try again.
The MacBook can neither accept nor deny the password. Its the Wi-Fi router that does this verification and that tells the MacBook wether the supplied password is correct or not.
Check that the password you are entering is correct for the router you are trying to connect to.
Make sure you have chosen the correct Wi-Fi network for the password you have.
If possible, reset the Wi-fi router and try again.