Grammar point
Degree Complement (程度补语), is used after a verb or an adjective to explain the degree of an action, the nature of a thing or the reached degree of a state.
Example
Degree complements without 得
Adjective/Mental verbs + 极/透/死/坏 + 了
Qiūtiān de shuǐguǒ duō jí le
秋 天 的 水 果 多 极 了。
Fruit is abundant in autumn.
Jīn nián xià tiān rè sǐ le
今年夏天热死了。
It's too hot this summer.