glummer

Example:When Barbara heard the good news, she was so cheery that it was contagious.

Definition:Expressing or feeling cheerfulness, especially in a way that may seem insincere.

Example:After winning, he was in a happy mood and high-fived everyone on the team.

Definition: Enjoying or characterized by enjoyment and pleasure.

Example:Jenny was so bright that she could always cheer up even the gloomiest glummer.

Definition:Quick-witted and cheerful; jocular.