palatalization
noun
pal·a·tal·i·za·tion ˌpa-lə-tə-lə-ˈzā-shən 
1
: the quality or state of being palatalized
2
: an act or instance of palatalizing an utterance
in rapid speech the \\t\\ in got undergoes palatalization before you to yield \\ˈgächə\\
Word History
First Known Use
1863, in the meaning defined at sense 1