Acquiescent (adjective)

Willing to accept or comply without protest or hesitation.

Origin:

From the verb acquiesce, from latin acquiescere "to be quiet, rest, agree".

Examples:

1. The employee was acquiescent to the manager's instructions.
2. He was an acquiescent partner in the relationship.
3. The patient was acquiescent to the treatment plan.
4. The child was acquiescent to the rules set by the parents.
5. The public was acquiescent to the new regulations.