The cocoon was a safe place for the caterpillar to grow.

Meaning: The silky covering that the caterpillar made around itself was a place where it was protected and could get bigger and stronger.

Choice of Words: Cocoon is a silky covering that the caterpillar makes around itself. Safe means that the caterpillar is protected from harm. Grow means to get bigger and stronger.

Alternative Expressions

Related Expressions