劣悪|れつあくretsuaku[0]heiban (flat)

1. na-adjectivepoor (quality, conditions, etc.); bad; inferior; poor-quality
   そのため、派遣労働者はけんろうどうしゃは劣悪れつあくな労働条件ろうどうじょうけんの下もとで働はたらいている。↗

   For that reason, temporary workers are working under inferior conditions.

• Synonym粗悪そあくNeutralFor goods that are crudely made and shoddy, as in 「粗悪品」. Unlike 「劣悪」, it is mostly said of merchandise, not of environments or conditions.
• Synonym下等かとうNeutralLow in rank or class, also base, as in 「下等な人間」. It carries contempt and sounds old-fashioned; 「劣悪」 is a neutral quality judgement.
• Synonym悪いわるいNeutralThe everyday word for bad. 「劣悪」 is a written, stronger way to say quality or conditions are bad.
• Synonym不良ふりょうNeutralPoor condition or defective products, as in 「整備不良」; also delinquents. 「劣悪」 stresses how bad quality or conditions are.
• Synonym低級ていきゅうNeutralMeans low in grade or class, as in 「低級品」, and can also mean vulgar, as in 「低級な趣味」. 「劣悪」 judges quality itself as bad.
• Synonym劣等れっとうNeutralBeing inferior to others, lower in comparison, as in 「劣等感」. It focuses on ranking below someone, not on poor quality or conditions.
• Related拙劣せつれつWrittenWritten/formal prose for clumsy skill or technique, as in 「拙劣な文章」. It judges ability, not conditions, so it cannot replace 「劣悪」 for environments.
• Related情けないなさけないNeutralPathetic, shameful, pitiable — said of people, results, even treatment or conditions, with a subjective sigh. 「劣悪」 is an objective verdict on quality.
• Related下手へたNeutralUnskillful, bad at something — it judges ability, while 「劣悪」 describes poor quality or conditions. Not interchangeable.
• RelatedひどいNeutralColloquial and very broad: terrible, awful, excessive. 「劣悪」 leans written and is limited to poor quality, environment or conditions.
• RelatedみすぼらしいNeutralShabby, unkempt — about appearance and clothing. 「劣悪」 is about quality and conditions, not looks.
• Related最悪さいあくNeutralThe worst; common in speech. 「劣悪」 stresses that quality or conditions are inferior, and is more written in flavor.
• Related惨めみじめNeutralMiserable, wretched — a situation that invites pity. It does not mean poor quality, so it cannot replace 「劣悪」.
• Related嘆かわしいなげかわしいWrittenWritten/formal: lamentable, deplorable, often said of trends or state of affairs, with a commenting tone. 「劣悪」 states facts of quality.
• RelatedへたくそCasualColloquial and insulting: extremely bad at something. It only covers ability, never quality or conditions.
• RelatedまずいNeutralColloquial: bad-tasting, also clumsy or a bad situation. Its uses differ from 「劣悪」, which is about quality and conditions.
• Antonym優秀ゆうしゅうNeutralAntonym: excellent, outstanding — mostly about people's ability. It stands opposite 「劣悪」.
• Antonym優良ゆうりょうNeutralAntonym: fine, superior quality, as in 「優良企業」. It is the counterpart of 「劣悪」 for poor quality.
• Antonym良好りょうこうNeutralAntonym: in good condition, as in 「経過は良好」. It is the direct opposite of 「劣悪」.
• Antonym秀逸しゅういつWrittenWritten/formal antonym: exceptionally fine, said mainly of works. It stands opposite 「劣悪」.

Use 「劣悪」 for extremely poor environments, conditions or quality, as in 「劣悪な労働環境」. For shoddy goods say 「粗悪」; for poor skill say 「拙劣」 or 「下手」. The everyday word is 「悪い」; 「劣悪」 is its written, stronger counterpart. Antonyms: 「良好」 for good condition, 「優良」 for fine quality, 「優秀」 for ability.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 品質ひんしつや能力のうりょくや状態じょうたいなどが悪わるい様子ようす。