also: ファジィ
na-adjective
Used in technical contexts (fuzzy logic, fuzzy sets) and in general language for things that are unclear, ambiguous, or not sharply defined.
ファジーな概念を明確に定義するのは難しい。
It's difficult to clearly define a fuzzy concept.
このシステムはファジー理論に基づいている。
This system is based on fuzzy logic.