Etymology
From Middle English sodden, soden, from Old English soden, ġesoden, from Proto-Germanic *sudanaz, past participle of Proto-Germanic *seuþaną (“to seethe; boil”). Cognate with West Frisian sean, Dutch gezoden (“seethed, boiled”) (related to Dutch zode (“swampy land”)), Low German saden, söddt,
German gesotten, Swedish sjuden, Icelandic soðinn. More at seethe.