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English louse
← Old English lūs (inherited)
← Welsh llau (cognate)
← German Laus (cognate)
← Middle English lous (inherited)
← Middle English lows (mention)
← Middle English lowse (mention)
← West Frisian lûs (cognate)
← Proto-Germanic *lūs (inherited)
← Proto-Indo-European *lewH- (root)
← Proto-Indo-European *lewH- (derived)
← German Low German Luus (cognate)
← Dutch luis (cognate)
← Sanskrit यूका (mention)
← Tocharian B luwo (cognate)

→ English spice (mention)
→ English woodlouse (compound)
→ English hice (mention)
→ English lousy (affix)
→ English delouse (prefix)
→ English head louse (affix)
→ English lousewort (compound)
→ English lousicide (suffix)
→ English booklouse (compound)
→ English louselike (suffix)
→ English louseborne (compound)
→ English pricklouse (compound)
→ English headlouse (affix)
→ English louse-ridden (compound)
→ English louseling (affix)
→ English louseless (suffix)
→ San Pedro Amuzgos Amuzgo quitsco (link)
→ Breton laou (cognate)
→ Cimbrian laus (cognate)
→ Welsh llau (cognate)
→ Esperanto laŭso (derived)
→ Latvian uts (cognate)
→ German Low German Luus (cognate)
→ Dutch luis (cognate)
→ Dutch luis (link)
→ Norwegian Nynorsk lus (cognate)
→ Pennsylvania German Laus (cognate)
→ Tok Pisin laus (derived)