like: Kühler → →
der Kühler ☊ 
bộ tản nhiệt ☊ 
☊ Kühler ☊ 散热器 ☊ sànrèqì As they climbed higher, the air became cooler. ☊ climb ☊
Cooler weather is forecast for the weekend. ☊ cool ☊
a cool wash cycle for delicate fabrics ☊ delicate ☊
Let's go and get some fresh air (= go outside where the air is cooler). ☊ fresh ☊
frozen peas ☊ frozen ☊