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enantiosemy 

A linguistic phenomenon whereby a word constitutes its own antonym depending on context. English, being widely spoken and/or occasionally mangled in the United States and recalcitrant parts of the commonwealth (i.e., Canada), features many enantiosemic words, including inflammable, nonplussed, and restive (with the latter meaning "impatient and fidgety" when applied to people and, owing to its French roots, "stubbornly refusing to move" when applied to horses).

From Gr. enantios ("opposite") + semasia ("meaning").
Gord: HOW DO MOUNTIES MANAGE TO BE NONPLUSSED ALL THE TIME, ANYWAY? THERE ARE GUYS WITH RACCOONS IN THEIR JACKETS AND STUFF—

Nigel: Actually, its prefix notwithstanding, and despite plussed's non-status as a word, "nonplussed" means the opposite of what it's commonly thought to mean.

Gord, nonplussed: OKAY, SO WE'RE TALKING ENANTIOSEMY, BUT LOOK, THE HORSE IS RESTIVE, AREN'T YA, BUD?

RCMP Thoroughbred: <snorts and offers an impregnable stare>

Inflammable means flammable? What a country! What enantiosemy!
―Dr. Nick Riviera, whose doctorate is in linguistics, not medicine
enantiosemy by DrSJohnson November 26, 2019
Related Words

Enantiodromia 

The tendency of creating the opposite effect when you go to far to one side of any duality. Example: Always choosing the easy option will make things harder for you in the long run.
Muscle growth is an example of enantiodromia as repeated damage grows the muscle.
Enantiodromia by anonymous August 6, 2025
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.

Man, I just watched the funniest nutshot video ever.
Nutshot by Uberflaven March 1, 2009
Word of the Day on June 26, 2026

Nerd neck 

A "human" that spends so much time playing video games that their posture is level nerd neck. Everytime anyone goes tryhard they hunch down and their neck gets longer there fore a nerd neck is always hunched down cause they're always going try hard. In other words a nerd neck is a try hard, since their neck is 100% longer than the average human being due to playing too many video games and taking them serious, nerd necks are not even considered human anymore but something more sad. Nerd necks are often found on fortnite, their natural habitat usually being tilted towers.
What a fucking nerd neck!

He is building so fast, nerd neck!

Looser more like a nerd neck ha!
Nerd neck by D Sandwich Maker February 5, 2019
Word of the Day on June 25, 2026

love peace and chicken grease 

"another of sayin peace out or good bye"
Talk to ya later......Love, Peace, and Chicken Grease
Word of the Day on June 24, 2026
slip of the tongue perhaps,
Those idiots who drive around in a ridiculously raised pick up truck, making a top heavy vehicle even more top heavy and unstable
A:*gah*
B: "Whats the matter"
A: This dam prickup is blinding me.
B: Stupid thing's, as if there lights weren't blinding enough as it is.
prickup by lunasea September 28, 2009
Word of the Day on June 23, 2026