Donald Trump zinged Hillary Rodham Clinton as “shrill” at a business conference in South Carolina on Wednesday.

“Do you know the word ‘shrill’?” he asked regarding Clinton, before raising his voice several octaves. “She can be kind of sha-riiiiiillllll!”

The conference room for Wednesday’s Charleston event, co-hosted by the South Carolina African-American Chamber of Commerce, was only half-full, with nearly all of the 500 attendees consisting of white Trump supporters, MSNBC reported.

Trump dedicated much of his 40-minute speech to swipes at Clinton, Caroline Kennedy and his Republican rival Carly Fiorina.

Trump called Kennedy too “nice” to be ambassador to Japan and slammed Fiorina as “a disaster.”