wú dòng yú zhōng无动于衷unmoved; indifferentHSK 6 · Frequency 3.5Meaningsindifferent; unconcernedaloof; detachedExample sentences听到这个消息,他竟然无动于衷。对别人的困难不能无动于衷。无论我怎么劝说,他都无动于衷。