The columellar lip of this shell has a very beautiful shape.

He is studying the shape of the inner lip of the shell.

There is a proverb, 'a cornered rat will bite a cat,' which means that a person driven into a desperate situation will fight back even against an opponent they would normally fear.

He is brushing his lower teeth.

He smiled, showing his lower teeth.

He was complaining about pain in his armpit.

I plan to spend the afternoon at the library.

The emperor issued an order to the entire army to start the attack.

The emperor ordered the entire army to attack.

It's a bit difficult to remember the conjugation of the lower monograde.