中

凹

Unicode: U+51F9

Pinyin: āo wā

Definition

āo:* 周围高，中间低，与"凸"相对。 ～凸不平。～透镜。～版印刷（印刷术之一，与"凸版印刷"相反）。 wā:* 同"洼"（用于地名） 核桃～（在中国山西省）

concave, hollow, depressed; a pass, valley

Structure

凹 graph

Related substructures

T5IjIDcA

Precursors

Transmitted Pre-Qin Forms
Pre-Qin forms (≤221 BCE) / late 2nd century BCE onward (Han → later textual transmission)
Pre-Qin character forms preserved through later textual transmission (often discussed as the 'Old Text' / guwen tradition). Shaped by repeated copying, they can diverge from excavated Warring States materials.Wikipedia ->
85_F03F

Last Modified: 2026-01-29 11:48 UTC