Antonyms of verb applaud

1 of 2 senses of applaud

Sense 1
applaud, clap, spat, acclaim -- (clap one's hands or shout after performances to indicate approval)
       Antonym of boo (Sense 1)
      => boo, hiss -- (show displeasure, as after a performance or speech)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb applaud

2 senses of applaud

Sense 1
applaud, clap, spat, acclaim -- (clap one's hands or shout after performances to indicate approval)
       => gesticulate, gesture, motion -- (show, express or direct through movement; "He gestured his desire to leave")

Sense 2
applaud -- (express approval of; "I applaud your efforts")
       => praise -- (express approval of; "The parents praised their children for their academic performance")