mid-13c., "to put on the ground, to strike down to the ground," from ground, n.. Of ships, "to run into the ground," from mid-15c. Meaning "to base" (an argument, sermon, etc.) is late 14c. Meaning "deny privileges" is 1940s, originally a punishment meted out to pilots (in which sense it is attested from 1930). Related: Grounded; grounding.

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" (cognates: 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.

"reduced to fine particles by grinding," 1765, past participle adjective from grind.