Yes, expressing noncommittal agreement or consent. / Yes; of course. / You're welcome; polite response to being thanked.

(law) An additional or extra tax.

(transitive) To impose a surtax upon.

(transitive) To give up into the power, control, or possession of another. / (military, by extension, transitive) To yield (a town, a fortification, etc.) to an enemy.

An act of surrendering, submission into the possession of another; abandonment, resignation. / The yielding or delivery of a possession in response to a demand.

That which remains when use or need is satisfied, or when a limit is reached; excess; overplus.

Being or constituting a surplus; more than sufficient.

(transitive) To treat as surplus to requirements; to sell off or dismiss from employment, etc.

Thought, imagination, or conjecture, which may be based upon feeble or scanty evidence; suspicion; guess. / Reflection; thought; posit.

To imagine or suspect; to conjecture; to posit with contestable premises.