teoretik
theorist,
theoretician
(redkeje)
SLABŠ
speculator
PRIMERI:
Berem razpravo znanega ekonomskega teoretika.
I am reading a treatise by a well-known economic theorist/theoretician.
Pri svojih nasvetih nikoli ne misliš na realno življenje - le teoretik si.
You never think of real life when giving advice - you merely speculate.