名詞 cinder:

1. a fragment of incombustible matter left after a wood or coal or charcoal fire
   同義詞：clinker

1. Clear out yesterday's cinders before you make the fire.
   生火前先把昨天的爐渣清除干凈。
2. The cake was burnt to a cinder.
   那塊餅給烤焦了。

cin.der

n.（名詞）

A burned or partly burned substance, such as coal, that is not reduced to ashes but is incapable of further combustion.
煤渣，煤屑：燃燒過或部分燃燒過的物質(zhì)，如煤，未形成灰燼但不能繼續(xù)燃燒
A partly charred substance that can burn further but without flame.
炭，余燼：一種部分燒焦的物質(zhì)，可繼續(xù)燃燒但無火焰
cinders Ashes.
cinders 木炭灰，煤灰
cinders Geology See scoria
cinders 【地質(zhì)學(xué)】 參見 scoria
Metallurgy See scoria
【冶金學(xué)】 參見 scoria
Slag from a metal furnace.
金屬煉爐的爐渣
v.tr.（及物動(dòng)詞）
cin.dered,cin.der.ing,cin.ders
To burn or reduce to cinders.
燃燒成灰燼或成為灰燼

來源：
Alteration influenced by Old French cendre [ashes] from Latin cinis
受 古法語 cendre的影響 [煤灰] 源自 拉丁語 cinis
of Middle English sinder
中古英語 sinder的變化
from Old English [slag, dross]
源自 古英語 [渣，渣滓]

【引伸】
cin.dery
adj.（形容詞）