paragoge
noun
par·a·go·ge
plural -s
: the addition of a sound or syllable to the end of a word either inorganically (as in against) or to give emphasis or modify the meaning (as in Hebrew)
Word History
Etymology
Late Latin, from Greek paragōgē, from paragesthai to be derived, be formed, passive of paragein to lead past, change (a letter slightly), from par- para- entry 1 + agein to lead, drive