Which one is it?
Just lie quiet and rest.

Does it mean;
Lie without making a noise and rest. or Lie without moving and rest..

Question

Which one is it?
Just lie quiet and rest.

Does it mean;
Lie without making a noise and rest.  or  Lie without moving and rest..

Answer

Lie is without making a noise and rest.

Answer

The precise meaning depends on the context.  "quiet" means silent, without noise.  The context may tell you that the speaker also wanted the other not to move.  "lie quietly" - adverb needed.