calcify

To calcify means to become hardened through calcium deposition. Think of fossils: ancient organisms whose remains have been slowly replaced by minerals over millions of years, essentially turning them to stone. This process happens in our bodies, too. Calcium deposits can build up in tissues, sometimes causing health issues—like calcified arteries, where blood vessels harden and narrow.

However, "calcify" isn't always about physical hardening. It's often used figuratively to describe something becoming rigid, inflexible, or set in its ways. A debate that "calcifies" into opposing viewpoints means it becomes stuck with no room for compromise. An idea that "calcifies" over time suggests it has become deeply ingrained and resistant to new information.

The word comes from the Latin calx, meaning "lime"—a key ingredient in limestone. So, whether you're talking about ancient fossils or stubborn opinions, calcify implies a process of hardening, solidifying, and becoming fixed. It's a powerful image suggesting something once fluid has become unyielding. You might say, "After years of disappointment, his heart had begun to calcify," meaning he became emotionally closed off and unable to feel deeply again.