The idiom 挥霍无度 is formed by combining the two-part phrase 挥霍, meaning to squander, with 无度, meaning without limit. 挥霍 itself derives from 挥 (to scatter) and 霍 (sudden), suggesting rapid, wasteful expenditure, while 无度 comes from 无 (without) and 度 (limit). Together, they create a compound that literally conveys spending extravagantly and without restraint.