na-adjective, noun
unclean; dirty; unsanitary; filthy
Describes physical dirtiness, lack of hygiene, or unsanitary conditions. Often used in medical, public health, or everyday contexts.
不潔な手で食べ物を触らないでください。
Please don't touch food with dirty hands.
This room is filthy, so it needs cleaning.
na-adjective, noun
indecent; obscene; immoral; dirty (story, money, etc.)
Used for morally or sexually impure things, such as obscene jokes, dirty money, or indecent behavior. Carries a strong negative judgment.
彼は不潔な冗談ばかり言う。
He always tells dirty jokes.
不潔な金は受け取れない。
I can't accept dirty money.