Synonyms of 'cheer up'
▷ See cheer
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If something perks you up or if you perk up, you become cheerful and lively, after feeling tired, bored, or depressed.
She perked up and began to laugh.
When someone or something rallies, they begin to recover or improve after having been weak.
He rallied enough to thank his doctor.
Thesaurus for cheer up from the Collins English Thesaurus
When you cheer up or when something cheers you up , you stop feeling depressed and become more cheerful .