noun
what; what sort of thing
Used in questions or statements about the nature or content of something, often with a slightly formal or serious tone.
何事が起きたのですか。
What happened?
彼は何事にも真面目に取り組む。
He tackles everything seriously.
noun
Used with particles like も or でも to mean 'everything' or 'anything'; often in affirmative or negative contexts.
See also: 何事も
何事も経験だ。
Everything is an experience.
何事にも理由がある。
There is a reason for everything.
noun
what on earth?; what's the meaning of this?
Used as a rebuke or exclamation when questioning someone's actions or a situation, often with a tone of surprise or anger.
これはいったい何事だ！
What on earth is this?!
お前、何事だ、その格好は！
What's the meaning of that outfit?!