old master; venerable teacher
Respectful term for an elderly teacher or master, often in traditional arts, scholarship, or martial arts. Conveys deep respect and seniority.
彼は書道の老師に師事している。
He studies under an old master of calligraphy.
老師
old monk; aged priest
Specifically refers to an elderly Buddhist monk or priest, often a senior figure in a temple. Used with reverence.
老師は毎朝、本堂で読経する。
The old monk chants sutras in the main hall every morning.
The teachings of my old teacher still remain in my heart.
Composed of 老 (old, aged) and 師 (teacher, master). The term has been used historically in both secular and Buddhist contexts to refer to a respected elder.