1930–35; if + -en, of uncertain origin, perhaps an2 (hence a variant of archaic an if) or in’ (see -ing2), extracted from conjunctional uses of considering, excepting, etc.; cf. gin5
Words nearby iffen
IFC, if-come bet, Ife, -iferous, iff, iffen, iffy, if it ain't broke don't fix it, I.F.L.W.U., If music be the food of love, play on, IFN
Iffen dey didn't do dey work dey git whip till dey have blister on 'em.
Slave Narratives: a Folk History of Slavery in the United States From Interviews with Former Slaves|Work Projects Administration
Iffen he didn't want you to see him you jus' couldn't see him.
Slave Narratives: a Folk History of Slavery in the United States From Interviews with Former Slaves|Work Projects Administration
Dey found Henry real soon en tell him iffen he don't come on back to de field dat Mr. Harvey gwine to set de hounds on him.
Slave Narratives: A Folk History of Slavery in the United States From Interviews with Former Slaves: Volume II, Arkansas Narratives, Part 2|Work Projects Administration
If he ax de Lawd and have faith, he ken do; and iffen he don't have no faith, by den he can't.
Slave Narratives Vol. XIV. South Carolina, Part 1|Various
I is gwine to be qualified wid everything dat I does, iffen I does it fer money or no.
Slave Narratives Vol. XIV. South Carolina, Part 1|Various