gumshoen.
英 'gʌmʃuː | 美 'ɡʌmʃu
中文n. 胶底运动靴；套靴\nvi. 悄悄走；秘密行走\nadj. 偷偷做的
胶底运动靴；套靴
vi. 悄悄走；秘密行走
adj. 偷偷做的
词根词源
gumshoe (n.)"plainclothes detective," 1906, from the rubber-soled shoes they wore (allowing stealthy movement), which were so called from 1863 (gums "rubber shoes" is attested by 1859); from gum (n.1) + shoe (n.).
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