別荘|べっそうbessou[3]nakadaka (mid-high)

1. nounholiday house; vacation home; villa
   その別荘べっそうは清潔せいけつで整然せいぜんとしていた。↗

   The cottage was clean and tidy.
2. nounprison; jail

• SynonymビラNeutralLoanword for a villa, mostly in hotel and resort development names; rarely used on its own in daily speech.
• Synonym別墅べっしょWrittenWritten/formal prose word for a villa, with an old-fashioned flavor; rare in modern use. In everyday speech say 「別荘」.
• SynonymセカンドハウスNeutralLoanword for a second residence, often seen in real estate ads; feels more modern than 「別荘」.
• Synonym別業べつぎょうWrittenWritten/formal prose word for a villa away from the city, or a second occupation; almost never used today.
• Antonym本宅ほんたくNeutralThe home where one actually lives; the opposite of 「別荘」.

For a second house used for summer holidays or rest, say 「別荘」, as in 「軽井沢の別荘」; real estate ads favor 「セカンドハウス」. The opposite is 「本宅」, your main home.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 通常つうじょう暮くらす家いえとは別べつに建たてられた家いえ。特とくに避暑ひしょや休養きゅうようなどのためのもの。
2. （隠語いんご）刑務所けいむしょ。