4 adjectives to describe passionless

It was a doctor's call, cool, passionless, commanding.

How serene, passionless, strong they seemed!

"Here, give me that lamp!" He looked first at Pavonius Nasor, who gazed back, at him with stupid, passionless, already dimming eyes.

Thus it would continue, argument succeeding argument, a declamatory give and take, dignified, passionless, theatrical.

4 adjectives to describe  passionless