na-adjective
poor; bad; inferior; low-quality
Describes quality, conditions, environment, or treatment that is markedly bad or substandard. Often used in formal or critical contexts.
この地域の労働環境は劣悪だ。
The working conditions in this region are poor.
劣悪な製品はすぐに壊れてしまう。
Poor-quality products break quickly.