Colloquial conjunction used to give a reason or justification, often with a defensive or explanatory tone. Common in casual speech.
After all, I was busy too.
Why were you late? — Because the train was delayed.
Colloquial conjunction used to introduce an objection or counterpoint, similar to 'but' or 'even so'. Often used in informal arguments.
But that's impossible.
He is kind. But sometimes he is too strict.
Particle meaning 'even' or 'also', attached to nouns. Emphasizes that the noun is included in a statement, often with a nuance of surprise or extremity. Can be used with question words to mean 'any-' (e.g., 誰だって = anyone).
Even a child can do it.
I want to go too.
Anyone makes mistakes.
Particle used at the end of a sentence to indicate hearsay or to seek confirmation, similar to 'I heard that...' or 'you mean...'. Often used in casual conversation to repeat or question what someone said.
They say it will rain tomorrow.
You mean he's not coming?
But I was busy, you know!
But isn't that wrong?
Even a child can understand that.
I heard he's not coming.
だって introduces a reason with a defensive or complaining tone similar to もの, but だって typically starts the sentence while もの comes at the end.
だって is a casual, often defensive 'because' typically used when answering a question, whereas なにせ is a set phrase for explaining a situation with a calmer, more explanatory tone.