矮 (ǎi): (人の背が)低い; (塀などが)低い; (地位が)劣る; より低い; (人や動物の背が)低い; (塀や建物などが)低い; (地位やレベルが)劣る; より低い

He is half a head shorter than me.

This wall is very low; it's easy to climb over.

Even though he is short, he is quite strong.

This low stool is for children to sit on.

In class, his grades are a notch lower than others.