在宅

1. Origins, structure, and basic meaning

• Structure: 在宅 (ざいたく) is a nominal expression for being at home that can also form compounds.
• Basic usage: 一日中在宅して predicates the state of staying home with する, whereas 在宅勤務 uses that state as the defining element of a work arrangement.

2. Common pitfalls and similar expressions

• Being home versus working from home
  • 在宅して荷物を待つ carries no work sense; it only says that someone stays home. The work interpretation is established by a compound such as 在宅勤務.