This is the 8146th most frequent Japanese word.
小遣い
Allowance; pocket money.
小遣い is used here to refer to the money regularly given by a parent as a form of allowance for discretionary spending.
毎月、お父さんにもらう小遣いをお菓子に使う。
Every month, I use the pocket money I receive from my father on candies.
小遣い signifies discretionary money earned independently, used for personal interests like travel.
アルバイトを始めてから、自分で稼いだ小遣いを旅行に活用している。
Since starting a part-time job, I use the money I earned myself as pocket money for traveling.
Here, 小遣い is extra discretionary money received on a special occasion, serving as an added allowance.