Definition: to make happy
It does seem a bit odd, when one stops to consider the matter, that so much of our time should be spent in the pursuit of happiness, and yet we have so few words which actually mean “to make happy.” Happify is one of the few, although there have been several others; similarly obscure words such as embliss and enhappy. None of these words have ever really taken with the English-speaking people, and happify, for all its charm, has even been objected to, on the grounds that it mixes the Saxon adjective of happy with the Latinate suffix of -fy.
His whipper mistook in using “miserified,” as the contrary of “happified;” for “miserified” is all Latin, whereas only one-half of happified is such. Miserablefied would have been a better word for their purpose.
—Ebenezer Hazard, letter to Jeremy Belknap, 14 Jan. 1791