a flaw, gap, or inconsistency in an argument, plan, or system; a security vulnerability

a cave or cavern in the ground or in the side of a mountain, large enough to hold people or animals

(astronomy) a celestial body with a gravitational field so strong that no light or matter can escape it; also called a [[坍缩星|坍縮星|tan1 suo1 xing1]]

cave or cavern inside a mountain

devoid of content; shallow or purely speculative (of speech, writing, or theory)

The mouth of a cave or the entrance to a tunnel

insight; discernment; perspicacity

to see clearly; to observe and understand thoroughly; to have insight into

An underground shelter or tunnel built for protection against enemy air raids.

a natural cave formed by the erosion of soluble rock, such as limestone, by groundwater; often contains stalactites and stalagmites

A large, shallow lake in northeastern Hunan province; it is China's second-largest freshwater lake and serves as a major flood-control basin for the Yangtze River.

to understand thoroughly; to know clearly or possess deep insight into a matter

The bedroom of a newlywed couple; nuptial chamber.

A vaulted dwelling carved out of the earth or cliffs, common in the Loess Plateau of northwest China.

hole in a tree; tree hollow

an ancient name for Lake Tai, a large freshwater lake in the Yangtze Delta on the border of Jiangsu and Zhejiang provinces

(literary) a cave dwelling or mansion in the mountains where immortals, Daoist priests, or recluses live in legends and mythology

a cavern or grotto formed by the erosion of rock by groundwater

a natural cave or cavern, specifically one formed by the erosion of limestone by water containing carbon dioxide

a covered, arched passageway inside a gate, especially in traditional Chinese architecture

A tunnel or pipe structure built under a road, railway, or embankment for the passage of water or as a walkway for pedestrians.

to pierce through; to bore a hole through; to penetrate

a cave or cavern formed in a rock wall or stone cliff

a hole in the ground, such as a tunnel, cave, burrow, or dugout; can be natural or man-made

cave; cavern

a hole without a bottom

(idiom) full of flaws; riddled with errors; describes an argument, theory, or behavior that is inconsistent or lacks logic

A tunnel-like pipe or device used to produce airflow for testing the aerodynamics of vehicle models and systems.

a passage dug under the ground, through a mountain, or under water; same as [[隧道|隧道|sui4 dao4]]

(bound form) a heavenly abode or paradise where immortals live in Taoist tradition; also used to describe a place of extraordinary scenic beauty

a small hole or opening in an object; a cavity

to open widely; to be wide open, as of a door or window

describes an area that is completely black, dark, or gloomy; pitch-black

The arch of a bridge or the opening under it between bridge piers

Hongtong county in [[临汾|臨汾|lin2 fen2]], Shanxi province.

The bridal chamber and decorated candles; refers to wedding festivities or the wedding night itself.

(idiom) a place of unique beauty or charm; an altogether different world; a hidden paradise. Originally referring to the legendary abodes of immortals in Taoism, it is now used to describe landscape scenery or interiors that are surprisingly beautiful and lead one into a new realm.

Chinese wedding custom where guests visit the bridal room on the wedding night to play pranks and joke with the newlyweds

Upper Cave Man; a late Paleolithic human population whose fossils were discovered in 1933 at Zhoukoudian, Beijing.

To use bait or a clever trick to entice an enemy or a wrongdoer out of their hiding place.

Taepodong, a series of ballistic missiles developed by North Korea

(literary) to see or understand something very clearly; to have deep insight into

pit; hole in the ground; pothole

Hongtong county in Linfen, Shanxi province

A famous Tang Dynasty scholar and Taoist priest, widely worshipped as one of the [[八仙|八仙|ba1 xian1]]. He is depicted as a dignified figure with a sword and is considered the founder of the Quanzhen school of Taoism.

a cave, cavern, or pit; an underground tunnel or hole large enough for people or animals to enter

Buddhist grottos and caves; common name for the Mogao Caves [[莫高窟|莫高窟|mo4 gao1 ku1]] or Dunhuang Grottoes [[敦煌石窟|敦煌石窟|dun1 huang2 shi2 ku1]] in Gansu province

(idiom) utterly lacking in substance or meaning; describes speech or writing that is empty, shallow, and has no real content

A vertical bamboo flute with six or more finger holes; also simply called [[箫|簫|xiao1]]