Adjective + 极 + 了
极 (jí) means "extremely" or "very" and is placed after an adjective to intensify it to the highest degree. It is a concise and emphatic way to express that something has reached an extreme level.
今天的考试难极了,好多题都不会做。
Jīntiān de kǎoshì nán jí le, hǎo duō tí dōu bú huì zuò.
Today's exam was extremely difficult; there were many questions I couldn't answer.
山顶的风景美极了,值得爬上来。
Shāndǐng de fēngjǐng měi jí le, zhídé pá shànglái.
The scenery at the mountaintop is absolutely beautiful; it's worth the climb.
这家店的小笼包好吃极了。
Zhè jiā diàn de xiǎolóngbāo hǎochī jí le.
The soup dumplings at this restaurant are incredibly delicious.