1Unclean; dirty; unsanitary—used for places, objects, or personal hygiene.
台所が不潔だと食中毒の原因になる。
An unclean kitchen can cause food poisoning.
彼の服はいつも油で汚れていて、不潔に見える。
His clothes are always stained with grease and look unclean.
病院では不潔な器具は厳禁だ。
Unsanitary instruments are strictly forbidden in hospitals.
2Indecent, obscene, or morally dirty; can refer to sleazy behavior or tainted money.
彼の発言は不潔で場にそぐわない。
His remarks were indecent and inappropriate for the setting.
不潔な金で取引することは許されない。
It's unacceptable to deal with tainted (ill-gotten) money.
その雑誌には不潔な写真が掲載されていた。
That magazine published obscene photos.