How to pronounce “unsentimental” in English

And I wanted to write an unsentimental book about this.

I wanted to write what I called an unsentimental book about a sentimental subject.

Sometimes you need someone as cold blooded and unsentimental and ruthless as Curtis LeMay if you want to win a war.

His nemesis, a hard-bitten, unsentimental, ruthless realist named Curtis LeMay is going to replace him.