obstacle; hindrance; impediment
Refers to something that interferes with progress or smooth operation; often used in formal or business contexts.
The construction delay caused an obstacle to the plan.
The lack of funds is a hindrance to the project.
The construction noise is causing problems for the neighborhood's daily life.
The typhoon caused disruptions to transportation.
I don't think this change will cause any problems for the work.
Noise becomes a hindrance to work.
妨げ is a more direct, everyday word for something that obstructs, whereas 支障 is slightly more formal and typical of business or official language.
差し支え and 支障 both mean a problem that prevents things from going smoothly, but 差し支え is used more in polite everyday speech (差し支えなければ), while 支障 favors formal/business contexts.
不都合 refers to something inconvenient or improper for a situation, while 支障 focuses more narrowly on something blocking a process from proceeding.
railway crossing emergency button
Composed of 支 (branch, support, obstruct) and 障 (hinder, block). The combination conveys the idea of something that obstructs or interferes.