a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions)

To replace (a software program) with a more recently released, enhanced version, To improve the quality of (livestock or crops) through breeding, To exchange a possession for one of greater value or quality; trade up, verb_ to improve, usually applied to technology, generally by complete replacement of one or more components, give better travel conditions to, computing to replace a program with a later version of itself, a version having a higher version number or marketed under a more recent product name, noun_ the act of improving something (especially machinery) by raising it to a higher grade (as by adding or replacing components), a reservation that is improved, A hardware device that provides greater performance than an earlier model, adverb & adjective_ Uphill

A tub for relaxation or invigoration, usually including a device for raising whirlpools in the water, A health resort near a mineral spring or hot spring, a place of business with equipment and facilities for exercising and improving physical fitness

someone who exhibits great independence in thought and action, One who rebels, a person who takes part in an armed rebellion against the constituted authority (especially in the hope of improving conditions), verb_ break with established customs, take part in a rebellion; renounce a former allegiance, intransitive verb_ To refuse allegiance to and oppose by force an established government or ruling authority, To feel or express strong unwillingness or repugnance, To resist or defy an authority or a generally accepted convention, adjective_ Pertaining to rebels or rebellion; acting in revolt; rebellious