This is the 14967th most frequent Korean word.
반헌법적
"Anti-constitutional."
The word '반헌법적' is used here as an adjective to describe the bill being against constitutional principles.
이 법안은 반헌법적이라는 주장이 제기되었습니다.
It was argued that this bill is unconstitutional.
In this sentence, '반헌법적' modifies '행위' to specify actions that are against the constitution.
나는 반헌법적인 행위에 반대합니다.
I oppose unconstitutional actions.
Here, '반헌법적' is used adverbially as part of '반헌법적으로,' describing how the policy was judged by experts.