師

1. The Mobilized Collective: An army, division, or disciplined body of people capable of ordered deployment; a professional cadre acting with a singular purpose.

2. The Specialized Authority: A teacher, mentor, or specialist in a craft or tradition; the individual possessing the expertise and authority required to lead and instruct.

Primarily nominal (e.g., "the army," "the teacher"). It may function attributively to specify that an organization is expert-led or military in character. In rare instances, it may imply the act of leading or organizing a multitude.

• vs. 軍 (jūn): While both refer to military entities, jūn often emphasizes the camp, the strategic establishment, or the institutional army; 師 focuses on the organized body of people and their deployment.
• vs. 兵 (bīng): bīng refers to individual soldiers or weaponry; 師 is the organizational structure that contains them.
• vs. 教 (jiào): jiào refers to the act or system of instruction; 師 is the person or authority who embodies that expertise.

In early texts, the military sense (organized force/division) is often primary; avoid an automatic reading of "teacher" unless the context explicitly involves pedagogy or ritual transmission. In contexts influenced by the Yi Jing, 師 emphasizes ordered force and legitimate leadership over raw numerical size.