MEANS SHOW APPROVAL or praise by clapping.So, the most appropriate antonym of 'Applaud' is 'Criticize', which means indicate the faults of (someone or something) in a disapproving way.Let us LOOK into the meaning of other words:'Praise' means express warm approval or admiration of.'Clap' means strike the palms of (one's hands) together repeatedly, typically in order to applaud someone or something.'Cheer' means shout for JOY or in praise or encouragement.