Word curio icon

Word Curio

September 5, 2021

Word of the Day: Adamantine

2 CQ

Word of the Day : September 5, 2021

adamantine \ad-uh-MAN-teen\ adjective

What It Means

Adamantine means "rigidly firm" or "unyielding."

// The laws were adamantine and were inscribed on bronze tablets.

// The ushers were adamantine in their refusal to let latecomers into the theater.

See the entry >


Aired September 5, 2021

All Merriam-Webster content is available at

  • Recommended Recommended
  • History & In Progress History
  • Browse Library
  • Most Popular Library

Get Personalized Recommendations

Let us help you figure out what to learn! By taking a short interview you’ll be able to specify your learning interests and goals, so we can recommend the perfect courses and lessons to try next.

Start Interview

You don't have any lessons in your history.
Just find something that looks interesting and start learning!

500 characters max
Josh O
Great word
500 characters max