盾构机 dùngòujī tunnel boring machine Origin Definitions Defs Strokes Stroke Words Sentences Sents 盾 dùn noun shield an ancient defensive weapon used to block blades and arrows构 構 gòu nounverb to construct (bound form) to construct, to build, or to form; to put parts together to create a structure or composition机 機 jī noun machine (bound form) machine; mechanism; engine