Changing a sound to be more like the sound made when the middle of the tongue touches the roof of the mouth.
Palatalizing is a technical term used in linguistics to describe how sounds change.
Examples:
She is palatalizing the 't' sound in the word 'nature'.
Palatalizing the 'k' sound in 'key' makes it sound different.
The language teacher is palatalizing the 'd' sound in 'dog'.
I am palatalizing my name to sound like a cat's name.
Palatalizing the 's' sound in 'sun' makes it sound like 'shun'.
Palatalizing the 'g' sound in 'goat' makes it sound like 'j'.