Meaning

noun a group of seven bright stars in the constellation Ursa Major

noun a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing

verb move in a way resembling that of a plow cutting into or going through the soil

originFrom Middle English plouh, plow, plugh(e), plough(e), plouw, from Old English plōh (“hide of land, ploughland”) and Old Norse plógr (“plough (the implement)”), both from Proto-Germanic *plōgaz, *plōguz (“plough”). Cognate with Scots pleuch, plou, North Frisian plog, West Frisian ploech, Low German Ploog, Dutch ploeg, Russian плуг (plug), German Pflug, Danish plov, Norwegian Bokmål, Norwegian…

Etymology from Wiktionary, CC BY-SA 3.0