简易 (jiǎn yì): simple and easy; simplistic; simplicity

This Chinese grammar book uses simple diagrams to explain complex rules, so even beginners can understand.

To make it easier for elderly people to use, this phone has a simple user interface.

Walking along the river, we found a simple wooden bridge that only allowed one person to pass at a time.

Because of limited conditions, they had to build a simple shelter on the mountain to spend the night.