Assertion: plumb bob | /r/HasProperty | plumber
Facets:
Source sentences:
text: PLUMB Plumbum was the Latin for lead, and was used also of a scourge with a blob of lead tied to it, of a line with a lead ball at its end for testing perpendicularity, etc., the source of our plumb, plumber, plunge, plump, plumbago, plummet, etc.