sweb:

From Middle English swebben ?(“to sleep, swoon”), from Old English swebban ?(“to put to sleep, lull, kill”), from Proto-Germanic *swabjan?, *swēbijan? ?(“to lull, put to sleep”), from Proto-Indo-European *swep-, *sup- ?(“to sleep”). Cognate with Icelandic svefja ?(“to sleep”), Latin sōpiō ?(“put to sleep, lull”, verb). Related to sweven.