cheer
Definitions
A shout of encouragement, approval, or congratulation.
A state of gladness, optimism, or high spirits.
To give comfort or support to someone.
Examples
The crowd let out a loud cheer when the home team scored the winning goal.
She tried to cheer him up by telling him a funny story about her day.
The bright colors of the garden always cheer me up on a gloomy morning.