tin1 cim3天塹天堑

Jyutpingtin1 cim3
Yaletīn chim

Definition

Natural barrier or moat, especially a wide river that serves as a military defense.

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How it's used

Literary in nature, this term is rarely used in casual daily conversation and is mostly reserved for formal writing, historical accounts, or news reports describing geographical obstacles. It carries a sense of grandeur and historical weight, often implying that the barrier is difficult to overcome or cross. When used in speech, it sounds quite dramatic or academic.

Examples

The Yangtze River acts as a natural barrier, hindering transport between the two banks.

Common phrases

the natural barrier of the Yangtze River
to cross a natural barrier

Common mistake

Learners often mistake this for a common word for any river or ditch, but it specifically refers to a formidable, wide, or deep natural barrier that serves as a defensive line. Using it to describe a small stream or a simple canal would sound unnatural and overly poetic.

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector