何物
な
に
も
の
Meanings
1
what kind of thing; what
Used to ask about the nature or identity of something, often with a nuance of suspicion or emphasis. Common in rhetorical questions.
What on earth is this?
He is irreplaceable (lit. something that cannot be exchanged for anything).
2
anything (else); nothing (but)
Used in negative or limiting constructions such as 何物にも, 何物でもない, meaning 'nothing but' or 'anything else'. Often emphasizes exclusivity or negation.
He is unfazed by anything.
That is nothing (of significance).