I find that it is not uncommon for the word extra to be pronounced without the letter 'x' being enunciated such that it sounds like /ˈɛkʃᵗrə/ instead of /ˈɛkstrə/. That is the /s/ sound is substituted with a /ʃ/ sound and the /t/ sound becomes much more diluted.
Are these two changes brought about by a single process or two distinct processes? What is/are it/they called?
xtr. Some of them get lost in the process. – Barmar Dec 17 '21 at 02:01