Words that come from Proto-Indo-European swep-

400 words across 75 languages descend from Proto-Indo-European swep- — including insomnia, hypnotic, hypnosis, somnolence, somnolent, soporific, somnambulism, hypnotherapy.

See the etymology of swep- itself →

English (95)

Latin (38)

Italian (36)

Icelandic (21)

French (19)

Norwegian Bokmål (11)

Ancient Greek (7)

Czech (7)

Proto-Indo-European (6)

Danish (6)

Polish (6)

Portuguese (6)

Norwegian Nynorsk (6)

Russian (5)

Irish (5)

Greek (5)

Armenian (5)

Asturian (5)

Spanish (5)

Sanskrit (4)

Galician (4)

Esperanto (4)

Aromanian (4)

Romanian (4)

Serbo-Croatian (4)

Old Armenian (4)

Proto-Indo-Iranian (3)

Lithuanian (3)

Catalan (3)

Telugu (3)

Proto-Slavic (3)

Proto-Germanic (3)

Faroese (2)

Urdu (2)

Old Irish (2)

Bulgarian (2)

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Swedish (2)

Westrobothnian (2)

Ukrainian (2)

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Old French (2)

Old Norse (2)

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Lower Sorbian (2)

Proto-Balto-Slavic (1)

Old Swedish (1)

Romani (1)

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Middle French (1)

Maithili (1)

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Dutch (1)

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Bengali (1)