It seems like they both mean something like to prevent but I prefer to know what does it mean exactly ?
nix transitive verb:
To refuse to accept or allow (something) : to say no to (something, such as a suggestion or plan)
To make (something, such as a task or action) slow or difficult.
Examples of HINDER
The witness refused to cooperate, hindering the investigation.
The country's economic growth is being hindered by the sanctions.