sootyoudaoicibaDictYouDict
soot: [OE] Soot is etymologically that which ‘sits’ on something – that is, a film which settles on a surface. The word comes from a prehistoric Germanic *sōtam, which was descended from the Indo-European base *sōd-, *sed- ‘sit’ (source also of English settle, sit, etc). By the time it reached English it had become specialized in meaning to the ‘fine black particles produced by burning’.
=> settle, sit
soot (n.)youdaoicibaDictYouDict
Old English sot "soot," from Proto-Germanic *sotam "soot" (cognates: Old Norse sot, Old Dutch soet, North Frisian sutt), literally "what settles," from PIE *sod-o- (cognates: Old Church Slavonic sažda, Lithuanian suodžiai, Old Irish suide, Breton huzel "soot"), suffixed form of root *sed- (1) "to sit" (see sedentary).