I use the word ‘goodish’ occasionally and I wondered when the word originated. It’s an interesting word in that it can mean a large amount (‘add a goodish amount of sugar to the mixture’) and can also mean good but not that good (‘He’s been goodish this season but he has a long way to go before he’s ready).
The Free Dictionary cites several sources and I am not sure without trawling through each of them individually which is the oldest. But this use of the word is from Charles Dickens’ Barnaby Rudge – in which there is this:
Ay, but then you know,’ returned Solomon Daisy, ‘his house is a goodish way out of London, and they do say that the rioters won’t go more than two miles, or three at the farthest, off the stones.
Solomon Daisy, is the parish clerk of Chigwell, one of John Willet”s three cronies.