1. invaluable
This experience will be invaluable as a way of improving the way I study English.
The Internet is an invaluable source of information.
This locket is invaluable.
Gerry makes an invaluable contribution as Team Ireland take the track by storm.
Once again your company has provided an invaluable service to the country.
If it weren't for your invaluable help, everything would be ruined.
For Thrawn, it was an invaluable tool.
At a time like this, they can be an invaluable resource
He always told me that I was invaluable to him.
Those invaluable ancient scrolls belong in a museum.
The book will be invaluable for students in higher education.
Her contacts in government proved invaluable to the company.
invaluable advice
But he said their services to students and teachers are invaluable.
The dictionary is an invaluable tool for learning languages.