Where does “drob” come from?

drob (Middle English) comes from Old English drōf, from Proto-West Germanic drōbī, from Proto-Germanic drōbuz — turbid, disturbed, troubled.

Ancestry of “drob”, step by step

drob traces back through two separate lines of ancestry.

via Old English drōf

StepLanguageWordMeaning
1Old Englishdrōfturbid; dreggy; dirty; dreggy; dirty; troubled
2Proto-West Germanicdrōbīturbid, cloudy; troubled, disturbed
3Proto-Germanicdrōbuzturbid, disturbed, troubled

via Old English drōb

StepLanguageWordMeaning
1Old Englishdrōb—
Every word from Proto-Germanic drōbuz →Every word from Proto-West Germanic drōbī →Every word from Old English drōf →