鐵屋 [铁－]

Jyutping tit3 uk1
Pinyin tiě wū

Definitions (Wiktionary)
  1. noun, figuratively, literary
    prison; jail
    (syn.) 監房, 监狱, 监牢, 清室, 囹圄, 牢, 監獄, 監牢, 牢房, 牢獄, 牢狱, 大牢, 班房, 监房