Does anyone know what it's called when a word's pronunciation changes based on context? I am not talking about different people pronouncing the same word differently (i.e. caramel).
E.g. I say "I am doing REE-search." v.s. when I say "implications for further ruh-SEarch" (or reh-search).
I also would NEVER dream to switch them, as that sounds totally wrong to me.
Can anyone offer other words like this? Does anyone know what this phenomenon is called?