熨烫 

Pinyin: yùntàng  
Meaning：Iron
Sentence: 我熨烫衬衫。I iron the shirt.

More: 

熨： 

Pinyin: yùn; yù
Meaning: smooth; iron
Radical: 火
Stokes: 15
Traditional: 熨
Common words/Phrase: 
熨斗 [yùndǒu] 【iron】
熨平 [yùnpíng] 【iron out】

烫： 

Pinyin: tàng  
Meaning: to scald; to burn; to iron; hot
Radical: 火
Stokes: 10
Traditional: 烫
Common words/Phrase:
烫发 [tàngfà] 【perm one’s hair】 
烫金 [tàngjīn] 【bronzing】
烫画 [tànghuà] 【purography】
烫洗 [tàngxǐ] 【scald】