師
シ, ス, もろもろ, なら.う, のし, のり, もろ, かず, つかさ, みつ
expert, teacher, master, model, exemplar, army (incl. counter), war
JLPT3 G5 S10 F563
As per 帀# (march) + an abbreviated form of 追 pursue an enemy army → lead (marching) soldiers → *army*. *Teacher* is a borrowed meaning (compare 帥) → *study under*; *boss*.
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