Words that come from Proto-Germanic slap-

7 words across 5 languages descend from Proto-Germanic slap- — including slap, slaf, schlapp, schlaff, Schlappschwanz, slappur, slap.

See the etymology of slap- itself →

German (3)

Danish (1)

Old High German (1)

Icelandic (1)

Middle Low German (1)