王室|おうしつoushitsu[0]heiban (flat)

1. nounroyal family
   この土地とちは王室おうしつのものです。↗

   This land belongs to the Royal Family.

• Synonym王族おうぞくNeutralRefers to members of the king's clan as individuals — a matter of personal status; 「王室」 leans toward the family as a whole or as an institution.
• Synonym王家おうけNeutralHighlights the king's family and lineage; 「王室」 more often covers the royal house as a whole, including its role as a state institution.
• SynonymロイヤルファミリーNeutralA loanword for the royal (or imperial) family, common in media coverage; in formal usage 「王室」 is preferred, as in 「英国王室」.
• Antonym平民へいみんWrittenWritten/formal prose: ordinary people holding no official rank or title — the social opposite of 「王室」.
• Antonym庶民しょみんNeutralEveryday word for the common people; stands at the opposite social pole from 「王室」.

Use 「王室」 for the king and his family as a whole, as in 「英国王室」. For royal members individually say 「王族」; for the royal lineage, 「王家」; media often use 「ロイヤルファミリー」. The opposites are 「庶民」 in everyday speech and 「平民」 in formal prose.

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

1. 国王こくおう及およびその親族しんぞく（王族おうぞく）。