v.
25A0; liven up BRIGHTEN UP, cheer up, perk up, revive, rally, pick up, bounce back; informal buck up.
25A0; liven someone/something up BRIGHTEN UP, cheer up, enliven, animate, raise someone's spirits, perk up, spice up, ginger up, make lively, wake up, invigorate, revive, refresh, vivify, galvanize, stimulate, stir up, get going; informal buck up, pep up.