Verbs

(v)lighten, lighten up, buoy upmake more cheerful“the conversation lightened me up a bit”
(v)lightenreduce the weight on; make lighter“she lightened the load on the tired donkey”
(v)lighten, lighten up, buoy upbecome more cheerful“after a glass of wine, he lightened up a bit”
(v)brighten, lighten up, lightenmake more cheerful through the use of color“The paint will brighten the room”
(v)lighten, lighten upbecome lighter“The room lightened up”
(v)relieve, lightenalleviate or remove (pressure or stress) or make less oppressive“relieve the pressure and the stress”, “lighten the burden of caring for her elderly parents”