- sinder (obsolete)
From Middle English cinder, sinder, from Old English sinder (“cinder, dross, slag, scoria, dross of iron, impurity of metal”), from Proto-Germanic *sindrą, *sindraz, *sendraz (“dross, cinder, slag”), from Proto-Indo-European *sendʰro- (“coagulating fluid, liquid slag, scale, cinder”). Cognate with Scots sinder (“ember, cinder”), West Frisian sindel, sintel (“cinder, slag”), Dutch sintel (“cinder, ember, slag”), Middle Low German sinder, sinter (“cinder, slag”), German Sinter (“dross of iron, scale”), Danish sinder (“spark of ignited iron, cinder”), Swedish sinder (“slag or dross from a forge”), Icelandic sindur (“scoring”), Old Church Slavonic сядра (sяdra, “lime cinder, gypsum”). Spelling (c- for s-) influenced by unrelated French cendre (“ashes”).
- Rhymes: -ɪndə(r)
cinder (plural cinders)
- Partially or mostly burnt material that results from incomplete combustion of coal or wood etc.
- An ember.
- Slag from a metal furnace.
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