Quiz: Remember the definition of mal de mer?
late 15c., from Middle French gain, from Old French gaaigne "gain, profit, advantage; booty; arable land" (12c.), from gaaignier "to gain" (see gain (v.)). The original French sense enfolded the notions of "profit from agriculture" and "booty, prey." Implied earlier in Middle English gaignage (late 14c.) "profit from agriculture."
1520s, from Middle French gagner, from Old French gaaignier "to earn, gain; trade; capture, win," also "work in the fields, cultivate land," from Frankish *waidanjan "hunt, forage," also "graze, pasture," from Proto-Germanic *wartho "hunting ground" (cf. Old English waþ "hunting," German Weide "pasture, pasturage," Old Norse veiðr "hunting, catch of fish"), from PIE *weie- "to strive after, pursue with vigor, desire" (see venison). Related: Gained; gaining. To gain on "advance nearer" is from 1719. To gain ground (1620s) was originally military.
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.
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.
"reduced to fine particles by grinding," 1765, past participle adjective from grind.
An increase in amount or degree.