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A Japanese word meaning “impossible,” “no way,” “unbelievable,” or “that can’t be”

Commonly used in anime (for example by Yuno in Black Clover) to react to something shocking, awkward, or hard to believe
A: “I’m stronger than you”
B: “Arienai”

You walk into class and accidentally see your teacher’s butt crack.
You: “Arienai”

A: “She’s not your friend. She’s been against you from the start”
B: “Arienai”
arienai by MonkeyDBesa March 26, 2026
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the best person you'll ever meet a gorgeous and pretty human being well loved by many, fun, trustworthy, humorous, smart, honest, caring and killer looks she has everything to become anyone's best friend she will be the only one there for you when everyone has left you and she will be the one to wipe the tears off your face,now she will have beautiful hair, a hot body and a nice ass and boobies
2. I feel sooo ariena tonight...
3. I will never let her go, she's such an ariena
Ariena by Parinae December 30, 2017
Related Words

arinaitwe 

Handsome loving boy you'd ever come across. Though you'd think his a show off but he prefers quality to quantity

I'd like to refer to him as a pillow fresher than a mint on it.
Low key people arinaitwe
arinaitwe by Sir. EA December 28, 2017

arienation 

An all purpose word that can not be utilized in any other way apart from when you could not possibly intricate on what just occured.
IS THAT DAN? No way, that's arienation.

Dude, I bought regular soft tacos thinking it was .99 but it was really chili chicken soft tacos that were .99 and regular chicken soft tacos were 1.39, can you say i got arienationed?

Arienationly, I lost in tennis against Yuki.

arienation by busHi^ October 25, 2005

Arenaing 

The act of doing arena in World of Warcraft.
Prot Pally: We were arenaing today and we made it to 1400!
Me: 1400 as prot? You suck dude!
Arenaing by seyesutol July 7, 2010
Ariena is an animal that comes out in the middle of the night and scares little children... Arienas are very good at ensnaring men. They can kiss well making them very desirable... that is until they drag you into their lair and dismember you. All in all, they are very nice to keep around as pets if you don't want crazy men to bother you.
Whoa dude, check out that chick!

Don't go for it man! She looks like an ariena!!!

arieneisha 

Arieneisha is a girl who’s bestie name is denise arieneisha can also be on Crackhead energy
That girl name is Arieneisha