paragoge

(ˌpærəˈɡəʊdʒɪ) or

paragogue

(Phonetics & Phonology) the addition of a sound or a syllable to the end of a word, such as st in amongst

[C17: via Late Latin from Greek paragōgē an alteration, ultimately from paragein to lead past, change]

paragogic, ˌparaˈgogical adj

ˌparaˈgogically adv

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

paragoge

the addition of a sound or group of sounds at the end of a word, as in the nonstandard idear for idea. Also called epithesis. — paragogic, paragogical, adj.