1To become narrower or to contract in width, range, or room (intransitive); can be used physically or figuratively (e.g., options narrowing).
この道は工事で一時的に狭まっているので注意してください。
This road is temporarily narrowed due to construction, so please be careful.
選択肢が狭まると決断が難しくなる。
When options narrow, making a decision becomes harder.
視野が狭まるような環境での作業は危険だ。
Working in an environment that limits your field of view is dangerous.