noun
easy chair; armchair
A comfortable, upholstered chair with armrests, often used for relaxing.
彼は安楽椅子に座って本を読んでいる。
He is sitting in an armchair reading a book.
Compound of 安楽 (comfort, ease) and 椅子 (chair). The exact origin is uncertain, but it likely emerged as a direct translation of Western 'easy chair' or 'armchair' during the Meiji or Taisho period.