not held in check or subject to control; "unhampered dissemination of news"; "this would give black people the opportunity to live unhampered by racism"
not slowed or blocked or interfered with; "an outlet for healthy and unhampered action"; "a priest unhampered by scruple"; "the new stock market was unhampered by tradition"
the power or right to prohibit or reject a proposed or intended act (especially the power of a chief executive to reject a bill passed by the legislature)
vote against; refuse to endorse; refuse to assent; "The President vetoed the bill"