残滓|ざんしzanshi[1]atamadaka (head-high)

1. no-adjectiveremains; dregs; vestiges; remnant; residue

• Synonym残渣ざんさWrittenWritten word for dregs or residue that, like 「残滓」, can also figuratively denote bad customs left from a former age; nearly synonymous with the headword.
• Related残りのこりNeutralThe neutral, everyday word for what is left over, as in 「残りの時間」; it lacks the pejorative dregs/vestiges nuance of 「残滓」 and is the most general choice.
• Related残余ざんよWrittenWritten/formal prose for a remaining part, as in 「残余の兵力」; neutral in tone, without the negative dregs shade of 「残滓」.
• Related残留物ざんりゅうぶつWrittenWritten term for a substance left behind after something is removed; leans toward scientific/chemical contexts, as in 「農薬の残留物」.
• Related残り物のこりものCasualColloquial word for leftovers, especially food, or things left over in daily life; it carries none of the dregs/vestiges nuance of 「残滓」.
• Antonym精髄せいずいWrittenWritten word for the essence or core of something; it stands as the opposite of the dregs/bad-vestiges sense of 「残滓」.

For what simply remains, say 「残り」. In written prose, use 「残滓」 for dregs or the bad legacy of a former era, as in 「封建制の残滓」; 「残渣」 is its near twin. Chemical residue takes 「残留物」, everyday leftovers 「残り物」, and essence 「精髄」.

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

1. 残り滓のこりかす。
2. 前代ぜんだいから残のこっている悪習あくしゅう。悪わるい名残なごり。