Disagree

v. i.
  1. To fail to accord; not to agree; to lack harmony; to differ; to be unlike; to be at variance.
  2. To differ in opinion; to hold discordant views; to be at controversy; to quarrel.
  3. To be unsuited; to have unfitness; as, medicine sometimes disagrees with the patient; food often disagrees with the stomach or the taste.

Usually followed by with, sometimes by to, rarely by from; as, I disagree to your proposal.