self-assured and upbeat

adjective
UK /ˌself əˈʃʊəd ənd ˌʌpˈbiːt/
US /ˌself əˈʃʊrd ənd ˌʌpˈbit/

Feeling sure about yourself and happy in a cheerful way.

Even before the big game, Mia stayed self-assured and upbeat, cheering on her teammates.


OTHER MEANINGS

2. Calmly sure of your own abilities while keeping a bright, hopeful mood.

The self-assured and upbeat speaker answered every question with a smile.

3. Showing steady belief in yourself together with a lively, happy attitude.

Her self-assured and upbeat manner made the new students feel welcome.

4. Acting with quiet confidence and an encouraging, energetic spirit.

He gave a self-assured and upbeat presentation that won the class over.