The antonym for ‘quell’ is ‘incite’.
‘Quell’ means to suppress or put an end to something, especially by force, like calming a riot or reducing intense emotions. On the other hand, ‘incite’ means to encourage or stir up actions or feelings, often leading to unrest or disorder. While ‘quell’ is about stopping or calming, ‘incite’ is about provoking or escalating, making them opposite in meaning.