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Proto-Indo-European *swel-

→ English sill (mention)
→ English sulfur (mention)
→ English sylvan (mention)
→ English swelter (inherited)
→ English swill (derived)
→ English sweal (derived)
→ Old English syll (mention)
→ Old English swelan (inherited)
→ Catalan selva (mention)
→ Catalan sofre (mention)
→ German schwelen (derived)
→ Spanish azufre (mention)
→ Spanish selva (mention)
→ French soufre (mention)
→ Old French selve (derived)
→ Proto-Germanic Schwelle (derived(gem-pro/de))
→ Galician enxofre (mention)
→ Galician xofre (mention)
→ Westrobothnian syll (inherited)
→ Westrobothnian schwȯhli (inherited)
→ Ancient Greek εἵλη (derived)
→ Icelandic sultur (derived)
→ Italian zolfo (mention)
→ Italian selva (mention)
→ Italian solfo (mention)
→ Latin sulfur (mention)
→ Latin silva (mention)
→ Latvian sala (cognate)
→ Latvian saule (mention)
→ Old Norse svalr (derived)
→ Old Spanish sufre (mention)
→ Portuguese silva (derived)
→ Portuguese enxofre (mention)
→ Portuguese selva (mention)
→ Romanian sulf (mention)
→ Aromanian scljifur (mention)
→ Tajik хӯрдан (derived)
→ Old Armenian քաղց (mention)
→ Yagnobi хварак (inherited)