unconstitutional

contrary to or violative of the constitution of a state or other sovereign institution

Japanese Meaning

憲法に反する / 違憲の

The Supreme Court declared the tax law unconstitutional after months of heated debate.

最高裁判所は数か月にわたる激しい議論の末、その税法が違憲であると宣言した。

Sense（1）

contrary to or violative of the constitution of a state or other sovereign institution

That recently passed political bill has been declared unconstitutional.

more unconstitutional

（ comparative ）

most unconstitutional

（ superlative ）