I just encountered an authorial note by Robert A. Heinlein, possibly written around 1980, that used the word happy-making. I think I only started to see that word used in the last twenty years or so, so I got curious about when it come into use. My dictionary was silent on the matter, but Google Books demonstrates, rather to my surprise, that it’s been in use since the 1840s or earlier. In particular, it’s listed in John Boag’s Popular and Complete English Dictionary, published in 1848. But it isn’t in any of my paper dictionaries.

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