Words that come from Proto-Indo-European rukn-

145 words across 48 languages descend from Proto-Indo-European rukn- — including rocket, frock, ratchet, skyrocket, rocketry, rocketship, unfrock, defrock.

See the etymology of rukn- itself →

English (36)

German (19)

Dutch (9)

French (7)

Italian (6)

Icelandic (4)

Finnish (4)

Luxembourgish (3)

Faroese (3)

Norwegian Nynorsk (3)

Proto-Germanic (3)

Old High German (2)

Swedish (2)

Middle Dutch (2)

Old Dutch (2)

Gothic (2)

Polish (2)

Hungarian (2)

Middle French (2)

Old French (2)

Middle English (2)

Middle Low German (2)

Japanese (1)

Crimean Tatar (1)

Fiji Hindi (1)

Westrobothnian (1)

Old Swedish (1)

Turkish (1)

Russian (1)

Armenian (1)

Old Frisian (1)

Yiddish (1)

Korean (1)

Norwegian Bokmål (1)

Old Norse (1)

Swahili (1)

Pennsylvania German (1)

Hindi (1)

Old Saxon (1)

Saterland Frisian (1)

Galician (1)

Portuguese (1)

Norman (1)

Romanian (1)

Spanish (1)

Frankish (1)

Middle High German (1)

Proto-Finnic (1)