零用

incidental expenses / sundries / pocket money

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore

zero / nought / zero sign / fractional / fragmentary / odd (of numbers) / (placed between two numbers to indicate a smaller quantity followed by a larger one) / fraction / (in mathematics) remainder (after division) / extra / to wither and fall / to wither

pocket money / allowance / spending money

petty cash