Low-level and Middle-level

Low-level adjective - At a low level in rank or importance.

Middle-level and low-level are semantically related. In some cases you can use "Middle-level" instead an adjective phrase "Low-level".

Middle-level adjective - Intermediate in rank or position.

Low-level and middle-level are semantically related. You can use "Low-level" instead an adjective phrase "Middle-level".