regressive assimilation

noun Phonetics.
  1. assimilation in which a following sound has an effect on a preceding one, as in pronouncing have in have to as [haf] /hæf/, influenced by the voiceless (t) in to.

Origin of regressive assimilation

First recorded in 1885–90
Also called anticipatory assimilation.

anticipatory assimilation

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018