invaluable

These principles, though imperfectly implemented, have proven invaluable to Americans.

Thirty-one days — and 5 ⅓ scoreless, invaluable innings of postseason relief work from Sasaki — later, it was a moment that might have helped save the Dodgers season, and launch the rest of his MLB career.

"To have Novak on the other side of the court was first of all an invaluable experience for me. I have a hundred feelings right now."

"It was a real challenge, probably the biggest challenge I've done. Having John there and having his guidance and help was invaluable," Aramayo said.

All of his guidance was invaluable to the production — and personally supportive.