profess
Definitions
To claim or declare openly, often insincerely or falsely.
To affirm one's faith in or allegiance to a religion or belief system.
To teach or practice as a professor.
Examples
He did not hesitate to profess his undying love for her in front of the entire crowd.
Although he claimed to be an expert, he could not profess any formal training in the field.
Many people profess to be concerned about the environment, yet few change their daily habits.