()

noun
objection, difference
1. objection, dissent
A statement of disagreement or opposition.
To raise an objection.
Formal expression
There is no room for objection.
()なし。
No objection.
Formal/legal
2. difference, distinction
Something that is different or unusual.
()なる文化(ぶんか)
A different culture.
To respect different opinions.
That is a different matter.

() has two main uses: as a noun meaning "objection" and as a prefix/modifier meaning "different" or "unusual." It appears frequently in formal and literary contexts.

AS "OBJECTION":

  • ()(とな)える: to raise an objection
  • ()(はさ)む: to interject an objection
  • ()なし: no objection (formal)
  • ()(ぞん)ない: no objection (formal/humble)

AS "DIFFERENT/UNUSUAL" (prefix in compounds):

  • 異常(いじょう): abnormal
  • 異動(いどう): personnel transfer
  • 異議(いぎ): objection, protest
  • 異国(いこく): foreign country
  • 異文化(いぶんか): different culture

NOTE:
()なる is a literary/formal equivalent of (ちが)う (different). It appears in written language: ()なる文化(ぶんか) (a different culture).