Commonly used for a driver's blind spot, but also for any area where visibility or awareness is blocked.
車を運転するときは死角に気をつけてください。
Please be careful of blind spots when driving.
dead angle; dead ground; dead space; sector without fire
Military and tactical term for an area that cannot be covered by direct fire or observation.
敵は死角から攻撃してきた。
The enemy attacked from a dead angle.
The bicycle ended up in the driver's blind spot.
このカメラには死角がある。
This camera has a blind spot.
この陣地には死角が多い。
This position has many dead spaces.
A blind spot easily forms behind large trucks.
This mirror is installed to eliminate blind spots.
They attacked by exploiting the enemy's blind spot.
死角 describes a physical or figurative blind spot where one can't be seen, whereas ノーマーク in sports means a player who simply isn't being defended.
四角 (a square/rectangle) is pronounced identically to 死角 but has a completely unrelated meaning of shape.
視覚 (the sense of sight) shares the same reading as 死角 but means the visual faculty itself, not an unseen area.
資格 (a qualification or license) is a homophone of 死角 with an entirely different, unrelated meaning.
死角 is counted with 箇所 because it refers to a specific spot or area that cannot be seen.
Standard kanji spelling; used in both everyday and technical contexts.
Compound of 死 (death, dead) and 角 (angle, corner), literally 'dead angle'. The exact historical derivation is uncertain, but the term is conventionally associated with areas where vision or fire is blocked.