講じる

1. Origins, structure, and basic meaning

• Structure: 講じる is read as こうじる and is an ichidan transitive verb with two senses here: taking measures and lecturing on a field of study.
• Basic usage: It is used for crowd-control measures in a shop and for a professor lecturing on classical literature.

2. Common pitfalls and similar expressions

• 対策を講じる
  • With 対策 as the を object, it means devising or taking the necessary measures.
• Lecture sense
  • In 学生に古典文学を講じる, it means lecturing to students on the subject, not taking a measure.