不潔

1. Origins, structure, and basic meaning

• Structure: 不潔 is read as ふけつ and is a noun and na-adjective meaning unclean or unsanitary because of dirt, waste, or poor hygiene.
• Basic usage: Leaving a kitchen unclean appears in 台所を不潔なままにする, while visually conveying filth appears in 不潔さを表す.

2. Common pitfalls and similar expressions

• A condition of poor cleanliness or hygiene
  • It goes beyond looking unpleasant and identifies a condition made problematic by inadequate cleanliness or hygiene.
• Difference from 汚い
  • Compared with the broad adjective meaning dirty, this word more strongly suggests failure to meet standards of cleanliness or hygiene.