Squirreling

My grandfather taught me the good habit of squirreling away money for a rainy day.

She's squirreling away her money.

Tom was squirreling away money here and there for many years, eventually enough to buy a house.

Instead of splurging on a vacation, I've been squirreling away money for the last four years to save up for a down payment.

Tom is grounded because his mom just discovered the secret cache of candy in his room that he'd been squirreling away for months.