妨害

1. Origins, structure, and basic meaning

• Structure: 妨害 is read ぼうがい. It means interference with or obstruction of an activity or process.
• Basic usage: It covers noise disrupting a class and a villain attempting to obstruct bridge construction.

2. Common pitfalls and similar expressions

• Become a disruption
  • 騒音が授業の妨害になった means the loud noise became a disruption to the class.
• Obstructing an activity
  • 橋の建設を妨害しようとした means attempting to obstruct construction of the bridge.