拱心石 (gung2 sam1 sek6) — keystone (the wedge-shaped stone at the top of an arch) in Cantonese
gungˊ²拱samˉ¹心sekˍ₆石Mandarin Pinyin: gong3 xin1 shi2
Meaning of 拱心石
nounkeystone (the wedge-shaped stone at the top of an arch)
Characters in 拱心石
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