Demur (verb)

1. To raise objection or show reluctance, especially on moral or conscientious grounds.
2. To delay, to hesitate or to be unwilling to do something.
3. To make a formal objection or opposition to something.

Origin:

From middle english demuren, from latin dēmorārī ("to linger, delay"), from dē- ("away") + morārī ("to dela.y")

Examples:

1. The lawyer demurred at the idea of representing such a high-profile criminal.
2. The investor demurred on the proposed acquisition, citing the high risk involved.
3. The employee demurred when asked to work overtime.
4. The judge demurred when asked to rule on the case before all the evidence had been presented.
5. The scientist demurred when asked to sign the document, as it went against her professional ethics.