It's Merriam-Webster's Word of the Day for May 28th.
Today's word is GADFLY, spelled as one word, G-A-D-F-L-Y.
GADFLY is a noun.
In literal use, GADFLY refers to any of various flies, such as horse fly,
bot fly, or warble fly, that bite or annoy livestock.
Gadfly is most popular in figurative use, however,
where it refers to someone who provokes or annoys other people, especially by persistent criticism.
Here's the word used in a sentence from the LA Times.
For years,
the LA County Board of Supervisors has regularly had a performance evaluation scheduled
for closed session on its agenda.
Any reporter or gadfly worth their salt knew this was actually just a time for the board to call a department head onto the carpet and scream at them behind closed doors.
It's easy to guess what puts the fly in gadfly.
In its oldest meaning, fly refers to a winged insect.
But, gadzooks, what about the gad?
As a standalone English word, gad means chisel.
But it once could be used for a spike spear or rod for goading cattle.
It was in the 16th century that gad was joined with fly to refer to any of several insects that bother livestock.
Before too long, English speakers began applying gadfly to people who annoy or provoke others.
One of history's most famous gadflies was the philosopher Socrates,