Merriam-Webster's Word of the Day for March 1, 2024 is:

inveterate • \in-VET-uh-rut\  • adjective

Inveterate is a formal word used to describe someone who is always or often doing something specified. For instance, a person could be an inveterate liar, or inveterate prankster. Inveterate can also mean "firmly established by long persistence," as in "an inveterate tendency to overlook the obvious."

// She's an inveterate traveler who constantly searches for flight deals to her next destination.

// Carla’s inveterate optimism keeps her going during challenging times.

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Examples:

"I am an inveterate name dropper as you have just very politely pointed out. I left it to the editor to decide whether something was too much ... and she just said, 'That is a reflection of how your brain works.'" — Richard E. Grant, quoted in The Los Angeles Times, 6 Aug. 2023

Did you know?

Despite how it may seem at first glance, inveterate has nothing to do with lacking a spine. That’s invertebrate, which came into English in the early 19th century from New Latin, the Latin vocabulary used in scientific description and classification. Inveterate, on the other hand, is a true veteran of the English language, with a membership card dating to the 15th century. Like veteran, inveterate ultimately comes from the Latin adjective vetus, which means "old." (In times past, inveterate had among its meanings "old.") The more direct source of inveterate, however, is the Latin adjective inveteratus, with which it shares the meaning "firmly established by long persistence." Today inveterate most often describes someone who so frequently or invariably engages in a particular habit or attitude as to be regularly identified with that habit or attitude, as when political columnist Jamelle Bouie observed "The truth is that our best presidents—or at least our most successful ones—have been inveterate flip-floppers, willing to break from unpopular positions, move with political winds, and adjust to new complications."