stoic; stoical
Describes a person or attitude that endures hardship without showing emotion, in the classical philosophical sense.
He never loses his stoic attitude no matter how difficult the situation.
self-disciplined; austere; strict with oneself
Commonly used for someone who imposes strict discipline on themselves, often in training, diet, or lifestyle. More about self-control than emotional suppression.
She strictly avoids sweets with self-discipline.
He follows an austere training regimen every day.
Refers specifically to a follower of Stoicism, the ancient Greek school of philosophy. Less common in everyday conversation.
Marcus Aurelius is a famous Stoic.
He is very disciplined when it comes to training.
She is known for her disciplined, stoic personality.
He leads a strictly disciplined, austere life.