不ふ可か分ぶん

noun which may take the genitive case particle 'no', na-adjective, noun

indivisible; inseparable; atomic

Used for things that cannot be divided or separated, often in formal or technical contexts. The gloss 'atomic' refers to the sense of being a fundamental, indivisible unit.

• この問もん題だいは不ふ可か分ぶんの要よう素そが多おおく、単たん純じゅんには解かい決けつできない。

  This problem has many inseparable elements and cannot be solved simply.