* Ortho- (ορθός): Meaning "straight," "right," or "correct." This root is found in words like:
* Orthodox: Adhering to established beliefs.
* Orthography: The correct spelling of words.
* Orthopedic: Relating to the correction of deformities in the musculoskeletal system.
* Orthodontics: The branch of dentistry that deals with straightening teeth.
* Euthy- (εὐθύς): Meaning "straight" or "direct."
* Euthanasia: The practice of intentionally ending a life to relieve pain and suffering.
* Euthyroid: Having a normal thyroid function.
* Rhet- (ρήτωρ): Meaning "speaker" or "orator." Though not directly meaning "straight," it implies a direct and clear way of speaking.
* Rhetoric: The art of effective communication.
* Rhetorical: Used for effect rather than to convey information.
Note: While the roots themselves convey the core meaning of "straight" or "correct," their actual meanings may vary depending on the specific context and word formation.