like: tốn kém → →
to not cost anything ☊ 
không tốn kém gì ☊ least expensive ☊ ít tốn kém nhất ☊ 
Deshalb benötigt er zu Hause immer eine Menge Nahrungsmittel, selbst wenn das viel kostet. ☊ Vì vậy anh ấy luôn trữ nhiều đồ ăn trong nhà, cho dù rất tốn kém. ☊ (Lektion 14, Nr. 154) Nichtraucher. Rauchen ist zu teuer. ☊ Không hút thuốc. Hút thuốc thì tốn kém lắm. ☊ (Lektion 20, Nr. 240) Das wird zu teuer. ☊ Điều đó sẽ trở nên quá tốn kém. ☊ (Lektion 115, Nr. 2158) It's going to cost an awful lot of money. ☊ awful ☊
It costs a bit more than I wanted to spend. ☊ bit ☊
Clearly, this will cost a lot more than we realized. ☊ clearly ☊
All these reforms will cost money (= be expensive). ☊ cost ☊
Good food need not cost a fortune (= cost a lot of money). ☊ cost ☊
cost sb sth: That one mistake almost cost him his life. ☊ cost ☊
Making the wrong decision could prove expensive. ☊ expensive ☊
Take out our service contract and say goodbye to costly repair bills. ☊ goodbye ☊
However you look at it, it's going to cost a lot. ☊ however ☊
Repairs involve skilled labour, which can be expensive. ☊ labour ☊
I must admit (= I feel that I should admit) I was surprised it cost so little. ☊ must ☊
Houses are less expensive in the North (= of England) than in the South. ☊ north ☊
The trip was expensive but it was worth every penny. ☊ worth ☊