1. cheerful (vs. depressing), beaming, glad, beamish, smiling(prenominal), twinkly, blithe, blithesome, lighthearted, lightsome, light-hearted, buoyant, chirpy, perky, cheery, gay, sunny, chipper, debonair, debonaire, jaunty, glad, happy

usage: being full of or promoting cheer; having or showing good spirits; "her cheerful nature"; "a cheerful greeting"; "a cheerful room"; "as cheerful as anyone confined to a hospital bed could be"

2. cheerful, pollyannaish, upbeat, optimistic (vs. pessimistic)

usage: pleasantly (even unrealistically) optimistic

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