ㄇㄣˋmènㄏㄨˊㄌㄨ˙lu

  1. 比喻破的啞謎不清事情水滸傳·二八》:終不成將息肥胖結果這個悶葫蘆如何?」紅樓夢·》:仙姑天分高明性情穎慧天機洩漏寶玉遊玩奇景何必悶葫蘆。』」

lit. closed gourd, fig. enigma, complete mystery, taciturn person
gourde close, énigme, ignorance