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German grob
← Old English hrēof (cognate)
← English gruff (cognate)
← Proto-Germanic *gahrubaz (inherited)
← Proto-Germanic *hrubaz (mention)
← Proto-Germanic *grubaz (inherited)
← Proto-Germanic *greubô (cognate)
← Middle High German grob (inherited)
← Middle High German grop (mention)
← Proto-West Germanic *gahrob (inherited)
← Proto-West Germanic *grob (inherited)
← Old High German grob (inherited)
← Old High German girob (mention)
← Old High German riob (cognate)
← Old High German griobo (cognate)
← Proto-Indo-European *krewp- (derived)
← Proto-Indo-European *gʰer- (derived)
← Low German groff (cognate)
← Dutch grof (cognate)
← Saterland Frisian groaf (cognate)

→ English gruff (cognate)
→ English greaves (cognate)
→ English crup (cognate)
→ Cimbrian gröobe (cognate)
→ German Griebe (mention)
→ German grobkörnig (compound)
→ German grobgemahlen (compound)
→ German grobporig (affix)
→ German Grobian (affix)
→ German Grobheit (suffix)
→ Luxembourgish graff (cognate)
→ Norwegian Bokmål grobian (mention)
→ Low German groff (cognate)
→ Norwegian Nynorsk grobian (mention)
→ Russian грубый (cognate)