IPA: /ˈtʃɪəfəl/
KK: /ˈtʃɪrfl/
Feeling or showing happiness and positivity; bright and pleasant.
She always has a cheerful smile that brightens everyone's day.
Comparative: more cheerful
Superlative: most cheerful
Cheerful is formed from "cheer" (from Old French *chiere*, meaning face or countenance) and "-ful" (meaning full of). The word "cheerful" means full of cheer or happiness, reflecting a bright and pleasant demeanor.
Think of someone with a bright 'face' ('cheer') who is 'full of' happiness ('-ful'). This helps you remember that cheerful describes a person who is happy and lively.