Verbs formed with up, down, over and under:
* overtake: exceed in numbers.
* overthrow: remove from power.
* overrule: change (by a superior)
* undercut: sell at a cheaper price than
* undergo: go through
* undertake: promise, make oneself responsible for.
* uproot: leave a place where you have settled down.
* uphold: confirm (a decision that had been questioned)
* downplay: appear less important than it is.
* downsize: reduce the size