Third-person singular simple present indicative form of underact.(verb)
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Use "underacts" in a sentence
"Likewise Shirley MacLaine- she overacts and underacts but never seems to just act, and whoever did her plastic surgery should be sued, considering she now looks worse than any woman her age and has been robbed of the majority of her capacity to show facial expression."
"Guns bang symphonically, blood flows torrentially, Reno underacts Frenchily and Oldman overacts like James Woods afflicted by rabies."
""We signed a contract with them - 31 shows as one of the underacts for the main show, for"