How to pronounce “fluctuating”(noun) in English

You don't need to have a voice that is that fluctuating, but think of playing with speed, pitch, tempo, intonation.

of being a solid self is actually much more in line with what we know the underlying reality to be, which is an endlessly fluctuating process

is actually much more in line with what we know the underlying reality to be, which is an endlessly fluctuating process