洞口 (Dòng kǒu) — entrance to a cave

Definition

Specifically the mouth or opening of a cave. Distinct from 入口, which is the more general word for any entrance (a building, a room, a gate).

noun
entrance to a cave
Measure word · 个

Examples

  • 洞口。
    Tā men fā xiàn le yí gè Dòng kǒu.
    They discovered an entrance to a cave.
  • 洞口,。
    Zhè ge Dòng kǒu hěn xiǎo, zhǐ néng yí gè rén jìn qù.
    This cave entrance is very small, only one person can go in.
  • 洞口。
    Cóng Dòng kǒu chuī chū lái de fēng hěn liáng.
    The wind blowing out from the cave entrance is very cool.

Origin

Compound word
构词法gòucífǎ
偏正piānzhèngModifier + head

The first part narrows down the second: it says what kind of thing the head is.

口kǒumouth

洞 is cave and 口 is mouth, so the word names the mouth of a cave.

Characters in this word

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

Meaning part形符xíngfú
水水shuǐwater
Sound part声符shēngfú
同
同tóng洞dòng
Close in sound todayThe sound part was a clue two thousand years ago — it often still helps, but not always.

洞 combines 水 (water) with 同, which gives the sound tóng.

Open 洞 →

A drawing of the thing itself, worn down over three thousand years into a few strokes.

The form 口 looks like an open mouth.

Open 口 →

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