惹 (rě) is a colloquial verb meaning 'to provoke' or 'to cause (trouble)' — it's the everyday word for making someone angry or stirring up problems. It's less formal than 招 (zhāo) 'to incur/provoke' and less aggressive than 挑衅 (tiǎo xìn) 'to deliberately taunt/provoke'. Unlike 激起 (jī qǐ) 'to arouse emotions', 惹 focuses on negative interpersonal consequences.