culvert, underground drainage ditch; underground drain; covered drain, underdrain

the period of time before daybreak

scotoma, scotomatous

a fragrance or scent from nowhere in particular; often alludes to the scent of plums

(mahjong) concealed kong

(mahjong) to make a concealed kong

a dark cave, a dark underground room

clever; smart; sharp / (prefix) emperor's; imperial

recitation / poem / composing / song

build; construct / run; operate; manage / (military) camp