Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

Old English grund "bottom, foundation, ground, surface of the earth," especially "bottom of the sea" (a sense preserved in run aground), from Proto-Germanic *grundus, which seems to have meant "deep place" (cf. Old Frisian, Old Saxon, Danish, Swedish grund, Dutch grond, Old High German grunt, German Grund "ground, soil, bottom;" Old Norse grunn "a shallow place," grund "field, plain," grunnr "bottom"). No known cognates outside Germanic. Sense of "reason, motive" first attested c.1200; electrical sense is from 1870.

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.