gumshoe I. \ˈ ̷ ̷ˌ ̷ ̷\noun Etymology:gum (III) + shoe 1. a.: a rubber overshoe b.: a sneaker with a rubber sole 2.alsogumshoer\ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷\: detective, policeman, investigator II. adjective : carried on or behaving surreptitiously < a gumshoe campaign > < a gumshoe man > III. intransitive verb : to go stealthily; broadly: snoop, pry