"Unsettling" is an adjective that means disturbing or upsetting:
The car accident was an unsettling experience.
She cried when she got the unsettling news. It was unsettling to learn that the history of the town was not what they were taught.
The strangers' eyes betrayed no dishonesty, but were an unsettling yellowish hue.
The sudden roar of the train was unsettling.
He has a total indifference to public opinion.
Her feeling of dread was like a shadow creeping over the sun, a premonition that something unsettling was about to unfold.
perturbing, troubling, worrisome, distressing, upsetting, alarming, unsettling.
Unsettling.
Unsettling, worrying.
i do not know how to use embalming in a sentence. (there is the sentence)
Unsettling.
So- you are asking when to use 'when' in a sentence. When you are asking how to use when in a question, you are already using when in a sentence, because a question actually is a sentence. I like to use when in a sentence whenever I like.
How do you use sedition in a sentence