留守番
るすばん · rusuban · JLPT N2 · noun
house-watching
🏠🔑 留守 = away from home + 番 = watch duty: keeping watch while the owners are out
留守 means 'not at home' and 番 means 'guard' or 'duty'. A rusuban is the person on guard duty while the household is away, like a house-sitter.
留 — 卯 (top) + 田 (field)
Originally a phono-semantic compound: 田 (field) suggests staying on the land, with 卯 hinting at the sound. Over time it came to mean 'remain, stay, keep,' as in keeping someone on the land or holding something in place. Modern uses include 留学 (study abroad) and 保留 (retain).
守 — roof 宀 + hand/measure 寸
Originally depicts a hand (寸) under a roof (宀), suggesting someone guarding or maintaining a household. The combination evokes the idea of holding or keeping watch over a place. From this concrete image of guarding a home, the meaning broadened to 'guard,' 'protect,' 'keep,' and 'observe (rules).'
番 — 釆 (animal tracks) on top + 田 (field) below
Originally a pictograph showing animal paw prints (釆) in a field (田), depicting tracks left by beasts. The early meaning related to taking turns or sequences, as tracks come one after another. It later extended to 'foreign' or 'barbarian,' and is now used as a measure word for occurrences or to mean 'number/turn.'