Sith Lord (Earth-2042)

"Get help. You're no match for him. He's a Sith Lord."

- Sheev Palpatine, to Obi-Wan Kenobi and Anakin Skywalker

Sith Lord is a title conferred upon individuals who follow the Sith tradition. Sith Lords draw upon the dark side of the Force, using it to gain power.

The title "Darth" is given to newly christened Sith Lords in place of their old identities. It roughly translates to "Dark Lord".

Source

 * https://starwars.fandom.com/wiki/Sith_Lord