Antonyms of verb underact

1 sense of underact

Sense 1
underact, underplay -- (act (a role) with great restraint)
       Antonym of overact (Sense 1)
      => overact, ham it up, ham, overplay -- (exaggerate one's acting)

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

1 sense of underact

Sense 1
underact, underplay -- (act (a role) with great restraint)
       => act, play, roleplay, playact -- (perform on a stage or theater; "She acts in this play"; "He acted in `Julius Caesar'"; "I played in `A Christmas Carol'")