同意

I can't go along with you on that point.

Some say yes and some say no.

I nodded my agreement/approval/yes.

She disagrees. / She doesn't agree. / She refuses to give her consent.

He echoed the view.

The higher authorities have approved our plan.

I don't share your opinion.

His contract ends by mutual consent.

agree unreservedly

agree unanimously; achieve unanimity (on sth)

ask sb's consent

give approval (to sth); express one's agreement

concur with sb's opinion

agree to a proposal