Today's Word

Mercurial

mər-KYUR-ee-uhl (or mur-KYOOR-ee-uhl)

Definition

(adjective) Subject to sudden or unpredictable changes of mood or mind; volatile, capricious.
Relating to the Roman god Mercury (or the planet Mercury), often implying qualities of cleverness, eloquence, or swiftness.

Example

Her mercurial temperament made her both exhilarating and exhausting to work with; one moment she was full of boundless enthusiasm, and the next, stormy and withdrawn.

Fun Fact

The word “mercurial” is derived from the Roman god Mercury, who was known for his speed, wit, and trickery. Mercury was also the messenger of the gods, and his unpredictable nature made him a fitting inspiration for the term. In alchemy, “mercurial” also refers to mercury (quicksilver), a liquid metal known for its fluid and volatile properties, reinforcing the word’s association with changeability. Over time, “mercurial” evolved to describe not only physical but also emotional and mental shifts, making it a vivid way to characterize people with ever-changing moods.

Previous Words

Inviolable

Today's Word

Inviolable

in-VY-uh-luh-bul

Definition

(adjective) Too important to be violated or compromised; secure from any assault or infringement.

Example

The organization had one inviolable rule — sources were never identified, under any circumstances, regardless of who was asking or what they were offering.

Word Origin

Inviolable derives from the Latin inviolabilis, meaning “that cannot be harmed” — built from in- (“not”) and violabilis (“able to be violated”), from violare (“to violate” or “to dishonor”), itself from vis meaning “force.” The same root gives us violate, violent, and inviolate — all words built around the idea of force applied against something that should be protected. It entered English in the 15th century, used in legal and religious contexts to describe rights, oaths, and sanctuaries that existed beyond the reach of ordinary power.

Fun Fact

The concept of inviolable sanctuary has ancient roots across virtually every human culture. In ancient Greece, the asylia — the right of sanctuary in a temple — was considered genuinely inviolable; armies that violated it risked divine punishment severe enough that many commanders refused to breach temple grounds even at significant military cost. In medieval Europe, the Church extended similar protections to anyone who reached consecrated ground. The modern concept of diplomatic immunity is a direct legal descendant of these ancient inviolable protections — the idea that certain persons and places exist in a category that force simply cannot legitimately reach.

READ MORE...

Mercurial

Definition

Example

Previous Words

Inviolable

Inviolable

Definition

Example

Word Origin

Inviolable

Elucidate

Allay

Convivial

Mendacious