What does "Nanda yo" mean in Japanese?
In Japanese anime, you've most likely heard people saying upset "Nandayo " (何だよ), and wondered what it means, and how it is used?
" Nandayo " (何だよ) Means basically: "What the hell!", The kanji: 何 - nan, means "what". Japanese people have "dayo" (-だよ) ending particles, that basically express that you are disturbed / irritated / angry... Japanese people sometimes use it in, for example, when you say "why", which would be "Doushite" (どうして) In Japanese, if you are angry, you can say "Nande dayo?!" (何でだよ) which also means "Why", but more like "But why?!" or "WHY?!?!?!"
Interesting... now I can swear in japanese! :D (I mean, if you do count hell as a bad word) eheheeheheheheheheheh
I can only say that it depends on the context. The basic meaning of 『何』 is " what " and " what do you mean ". When applied, the meaning of " why " and " how " can also be included. For it, 『何でだよ』 is more appropriate.
When used for an event, it means "What the hell!". If used for humans, the meaning is " Do you have anything to say? ".
『だ』 is 『断定（だんてい）の助動詞（じょどうし）』. 『断定』 functions affirmation. 『よ』is 『間投助詞（かんとうじょし）』. Its functions are " used when we start talking " and " emphasis ". 『だよ』 itself has no negative meaning. So, for example, you can use it like this.
It is also used when starting a conversation like this.
I don't understand why it was posted two years ago, but I tried to answer it seriously.