凹 (Chinese PinYin: [āo]; traditional Chinese: 凹) may mean: (1) adj. concave; (2) adj. hollow; (3) adj. denting. It is an everyday vocabulary and combine with other characters to form different compound words. Some common phrases and expressions are: 凹痕 (dent), 凹面镜 / 凹镜 (concave mirror), 凹面 (concave surface), 凹凸 (uneven), 凹陷 (to cave in), 凹洞 (cavity), 凹弧 (concave arc), 凹坑 (pit), 凹洼 (concavity), 微凹的 (slightly concave), 凹了进去 (concave), 凹形 (concave shape).

1. How to pronounce 凹?

Chinese Pinyin: [āo]

Pronunciation examples: Please click to play the below audio.

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Audio source: created by Baidu Voice

2. Synonyms And Antonyms of 凹

Synonyms: 陷, 入, 塌, 堕, 低,

Antonyms: 凸, 高

3. What are the fixed expression, collocation and idioms that contains 凹

Fixed expression: 凹痕 (dent), 凹面镜 / 凹镜 (concave mirror), 凹面 (concave surface), 凹凸 (uneven), 凹陷 (to cave in), 凹洞 (cavity), 凹弧 (concave arc), 凹坑 (pit), 凹洼 (concavity),

Collocation: 微凹的 (slightly concave), 凹了进去 (concave), 凹形 (concave shape),

Idioms: 凹凸不平 (uneven; sags and crests),

Terminologies: 凹版 (intaglio; gravure), 凹度 (concavation),

4. How to use 凹 in a sentence?

Below are some example sentences and quotes containing 凹.

4.1 人的手掌是微凹的。

Translation: The palm of one’s hand is slightly concave.

4.2 在做这个项目的时候，我将我的头撞上了窗台的门框留下了一道凹痕。

Translation: In doing this project, I bashed my head on a window sill and have a dent in my forehead.

4.3 大门上有一大块凹陷。

Translation: There was a large dent in the main entrance door.

4.4 第二，每当车出现凹痕或刮擦就向您的保险公司提出索赔的话会让您的保险单难以进行续保。

Translation: Second, making claims to your car insurance company every time you get a dent or scratch in your car can lead to your policy not being renewed.

4.5 那就是错误的认为保险单较少的可减免条款能帮他们节省钱，当车出现有凹痕，刮擦，门铃不响，甚至需要进行重大维修时他们就不用自己从口袋里掏钱出来维护。

Translation: They mistakenly believe that keeping a low deductible will save them money because they won’t have to pay much money out of their pockets for dents, scratches, door dings and even major repairs.

4.6 这个简易的工作台可以在你钉出图案的时候避免弄凹灯笼。

Translation: This thin work area helps to prevent denting to your lantern when punching the design.

4.7 他的前胸凹了进去。

Translation: He had a concave chest.

4.8 当水从底盘下方的空间中被抽走时，所产生的负压使这些可伸缩的传感器向下拉，形成凹形。

Translation: When water is pumped out of a chamber below the plate creating negative pressure, the stretchable sensors are pulled down, producing a concave shape.

5. Stroke Order

Stroke order images provided by Wikimedia stroke order project