But.. we could reference "a rise in the general price level caused by an imbalance between the quantity of money and trade needs" [1] (Cleveland Fed; On the Origin and Evolution of the Word Inflation).
[1] https://www.clevelandfed.org/publications/economic-commentar...
On reverting to to 'old' meanings, Adam Smith's The real price of everything...is the toil and trouble of acquiring it isn't inconsistent with Marx as long as toil and trouble is, in the end, people. Or perhaps myths of old beliefs that there was no sectoral, geographical nor temporal stickyness to anything. It's as if there were no sudden and unexpected changes in prices during times of a roughly constant amount of specie backing 'prices' that make 10% look like a storm in a teacup, though was it ever 1:1 or was hope to have the means to provide backing more accurate; specie based currency has a long history of volatility over the world, from West African empires to Asia.
We could even go farther... to say that inflation, a change in prices, is caused by expectations of inflation; that the supply of money is driven by the demand for money... and that gets us to whether demand is liability or asset driven which may be full circle.