n. 男教师, 男校长, 教导者

Schoolmaster \School"mas`ter\, n.
1. The man who presides over and teaches a school; a male
teacher of a school.

Let the soldier be abroad if he will; he can do
nothing in this age. There is another personage
abroad, -- a person less imposing, -- in the eyes of
some, perhaps, insignificant. The schoolmaster is
abroad; and I trust to him, armed with his primer,
against the soldier in full military array.
--Brougham.

2. One who, or that which, disciplines and directs.

The law was our schoolmaster, to bring us unto
Christ. --Gal. iii.
24.