Merriam-Webster's Word of the Day for January 19, 2026 is:

ephemeral • \ih-FEM-uh-rul\  • adjective

Something described as ephemeral lasts only for a very short time.

// The performance was not recorded, a fact that made its ephemeral nature all the more poignant.

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Examples:

"Like most garden moments, fresh holiday wreaths are ephemeral. Having accomplished their purpose of seeing us through the darkest days of winter, removing this traditional symbol of the wheeling seasons is a way to recognize the birth of a new year and celebrate the returning light." — Lorene Edwards Forkner, The Seattle Times, 16 Nov. 2025

Did you know?

In its aquatic immature stages, the mayfly (order Ephemeroptera) has all the time in the world—or not quite: among the approximately 2,500 species of mayflies, some have as much as two years, but a year is more common. But in its adult phase, the typical mayfly hatches, takes wing for the first time, mates, and dies within the span of a few short hours. This briefest of heydays makes the insect a potent symbol of life's ephemeral nature. When ephemeral (from the Greek word ephēmeros, meaning "lasting a day") first appeared in print in English in the late 16th century, it was a scientific term applied to short-term fevers, and later, to organisms (such as insects and flowers) with very short life spans. Soon after that, it acquired an extended sense describing anything fleeting and short-lived, as in "ephemeral pleasures."