拱桥 

Pinyin: gǒng qiáo 
Meaning：Arch bridge
Sentence：欧洲最早的拱桥是1345年在佛罗伦萨建成的。The earliest European segmental arch bridge was built at Florence in 1345.

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拱： 

Pinyin: gǒng
Meaning: to arch
Radical: 扌
Stokes: 3
Traditional: 拱
Common words/Phrase:
拱门 [gǒng mén] 【archway】
拱手 [gǒng shǒu] 【Hold one hand in another to show respect】
拱顶 [gǒng dǐng] 【vault】
拱廊 [gǒng láng] 【arcade】
拱高 [gǒng gāo] 【arch rise】

桥： 

Pinyin: qiáo 
Meaning: Bridge
Radical: 木
Stokes: 10
Traditional: 橋
Common words/Phrase:
桥梁 [qiáo liáng] 【bridge】
桥牌 [qiáo pái] 【bridge】
桥架 [qiáo jià] 【bridge】
桥接 [qiáo jiē] 【bridging】
桥墩 [qiáo dūn] 【pier】