# What is the Opposite(Antonym) of “convex”?

## The Opposite(Antonym) of “convex”

The antonyms of convex are concave and sunken. The antonyms concave and sunken describe a surface that curves inward instead of outward, which is the opposite of convex.

## Definitions and Examples of concave, sunken

Learn when and how to use these words with these examples!

### concave

Having a surface that curves inward, like the inside of a bowl.

Example

The spoon had a concave shape that made it easy to scoop up soup.

### sunken

Having a surface that is lower than the surrounding area.

Example

The old ship was sunken deep in the ocean, making it difficult to salvage.

## Key Differences: concave vs sunken

• 1Concave describes a surface that curves inward, like the inside of a bowl.
• 2Sunken describes a surface that is lower than the surrounding area.

## Effective Usage of concave, sunken

• 1Mathematics: Use convex and concave to describe the shapes of geometric figures.
• 2Science: Use convex and concave to describe the shapes of lenses and mirrors.
• 3Geography: Use sunken to describe landforms that are lower than the surrounding area, such as a sunken valley or basin.
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Remember this!

The antonyms of convex are concave and sunken. Concave describes a surface that curves inward, while sunken describes a surface that is lower than the surrounding area. These words can be used in mathematics, science, and geography to describe shapes and landforms.

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