caverna in English:

Without art our life would be hollow.

This melon sounds hollow. Maybe that's why it was so cheap.

a hollow tree

As if to answer my question, a long and hollow team rose from the forest.

When a book and a head collide and a hollow sound is heard, must it always have come from the book?

My life is hollow without him.

We heard somber hollow sounds from the cave.

The trunk of the tree was hollow on the inside, making it a great hiding place for the children.

They saw it as a hollow exercise on the part of senior management.

Because of the illness her cheeks were hollow.

hollow eyes / to feel hollow / hollow cheeks

Molly's prosthesis was a hollow cast with a pole at the bottom for balance.

a hollow ​tube. This ​tree ​trunk ​sounds hollow. a hollow ​victory

The government’s election promises now seem increasingly hollow.

Other matters receive far less attention, and useful rules remain hollow phrases.