coping saw

noun
🔊/ˈkəʊpɪŋ sɔː/
🔊/ˈkəʊpɪŋ sɔː/
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  1. a saw with a very narrow blade (= metal cutting edge) and a frame that has the shape of a D, used for cutting curves in wood(锯曲线用的)手弓锯
    Word Origin1920s: coping from the noun cope, used to describe likeness to a vault, arch, canopy, etc.