残余|ざんよzan'yo[1]atamadaka (head-high)

1. no-adjectiveremainder; the rest; residue

• Synonym残りのこりNeutralThe everyday word for what is left; plainer and far more common than the written 「残余」, and the natural choice in speech.
• SynonymあまりNeutralEveryday word stressing what is left over or the remainder in division; closer to daily speech than 「残余」.
• Synonym余剰よじょうFormalFormal term for excess beyond what is needed; a surplus or margin rather than a simple remainder.
• Synonym残り物のこりものCasualColloquial word for leftovers, especially food left after a meal; not for formal remainders.
• Synonym余り物あまりものCasualColloquial word for leftover things no longer needed, from surplus materials to uneaten food.
• Synonym残ざんWrittenWritten word for what is left or a balance; mostly used as a prefix rather than standing alone.
• Synonym残物ざんぶつWrittenWritten but rare word for things left over after use; scraps or leftovers, not a formal remainder.
• Related残滓ざんしWrittenWritten word for dregs or residue; also vestiges of a former age, such as lingering bad customs.
• Related取り残しとりのこしNeutralSomething left behind and not dealt with — the bits that were missed or left unattended, rather than the remainder in general.
• Related残留物ざんりゅうぶつWrittenWritten word for the substance left behind once something is removed, as in chemical residue.
• Related剰余じょうよFormalFormal term for what is left after the necessary part is removed; also the remainder in division.
• Related残渣ざんさWrittenWritten word for dregs or sediment left after something settles or is filtered out.

For the part that remains in written or formal prose, use 「残余」, as in 「残余の兵力」「残余財産」. In everyday speech say 「残り」 or 「余り」. For dregs or residue choose 「残滓」, and for what exceeds a need use 「余剰」.

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

1. 残のこり。余あまり。