世帯（せたい、setai）
- household

The Japanese word 世帯 (せたい, setai) refers to a "household" or a "family unit." It describes a group of people who live together in the same dwelling and share living expenses. This can include a single person living alone, a couple, a family with children, or even a group of unrelated individuals. The definition of 世帯 primarily revolves around the shared living arrangement and financial interdependence.

⚫︎私の世帯 Translation: My household. ⚫︎あの世帯は3人家族です。 Translation: That household is a family of three. ⚫︎一人暮らしの世帯 Translation: A single-person household.

⚫︎世帯 is used in various contexts, including official documents like census forms and tax returns. ⚫︎It's also common in everyday conversations to discuss family structures, living situations, and demographics. ⚫︎The word is particularly important when discussing legal and administrative matters related to residence, finances, and public services.

⚫︎The word is primarily written using the kanji 世帯. ⚫︎The reading is せたい in hiragana. ⚫︎There are no significant variations in writing or okurigana.

⚫︎家族 (かぞく): Family. (More general term for family members.) ⚫︎家庭 (かてい): Home, household (emphasizes the domestic aspect).

There are no direct antonyms, as 世帯 describes a state or a unit rather than a specific action. However, phrases like "separate households" could indirectly represent an opposite concept.

このマンションには、たくさんの世帯が住んでいます。 ・Translation: Many households live in this apartment building. ・Explanation: This sentence describes the variety of family units residing in the building.

世帯収入によって、税金が変わります。 ・Translation: Taxes change depending on household income. ・Explanation: This sentence explains the use of "household" in the context of financial matters.

The word 世帯 is composed of two kanji: 世 (せ, yo) meaning "world," "generation," or "age," and 帯 (たい, tai) meaning "belt" or "zone." Together, they metaphorically represent a group of people (a generation) within a particular space (a zone), thus forming a household or family unit. The kanji 世 gives the nuance of a "unit of people" and 帯 to describe a "group" or "unit."