These words all mean to spend less money. 以上各词均含存钱、节俭之义。

• save to keep money instead of spending it, often in order to buy a particular thing 常指为了买某物而攒钱、储蓄：◆I'm saving for a new car. 我正攒钱想买辆新车。
• budget to be careful about the amount of money you spend; to plan to spend an amount of money for a particular purpose 指谨慎花钱、把…编入预算：◆If we budget carefully we'll be able to afford the trip. 我们精打细算一点，就能够负担这次旅行。
• economize to use less money, time, etc. than you normally use 指节省、节约、节俭
• tighten your belt (rather informal) to spend less money because there is less available 指勒紧腰带省吃俭用：◆With the price increases, we are all having to tighten our belts. 由于物价上涨，我们都只好勒紧裤腰带了。

Patterns

• to save up/budget for sth
• to have to save/budget/economize/tighten our belts
• to try to/manage to save/budget/economize