What is an antonym for thick?

The best antonym for "thick" depends on the context. Here are a few options:

If "thick" refers to physical density:

* Thin

* Slender

* Fine

* Delicate

If "thick" refers to a liquid's viscosity:

* Thin

* Watery

* Fluid

If "thick" refers to the size of something:

* Narrow

* Slim

* Small

If "thick" refers to a person's intelligence:

* Sharp

* Bright

* Clever

* Smart

If "thick" refers to something being difficult to understand:

* Clear

* Simple

* Easy

* Obvious

If "thick" refers to a forest or a material:

* Sparse

* Thin

* Open

Choose the antonym that best fits the situation you are describing.