エン 
ほのお 
() inflammation () flame () blaze
      
ほのお (n) flame, blaze
えんしょう (n) inflammation, irritation
えんじょう (n,vs) (1) blazing up, (2) destruction of a large building by fire, (3) flood of comments to a blog, exceeding what the blog's owner can answer
えんてん (n) blazing heat, scorching sun

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Etymologies: 中文字譜 : 説文解字