godan verb (-mu), transitive verb
teach thoroughly; instill; drill into
Emphasizes persistent, repetitive teaching until the learner internalizes the knowledge or skill. Often used for rules, manners, or fundamental skills.
子供に交通ルールを教え込むのは親の責任だ。
It is a parent's responsibility to drill traffic rules into their children.
新入社員に仕事の基本を徹底的に教え込んだ。
I thoroughly instilled the basics of the job into the new employees.