► 副詞反面  [はんめん]    
meaning:  while  rank: 3☆ 
セラミックは
非常に
硬い反面脆い ⇨ Ceramics are very hard while, even though, very brittle at the same time
► 名詞反面  [はんめん]  [
反面教師]    
meaning:  opposite  rank: 3☆ うちの
父親は反面
教師だった ⇨ My father was a “reverse teacher”. I learned what not to do, whom not to be like, by watching my father