#2 and #3 both look pretty good to me, too; both cornerstone and bedrock seem appropriate to the relationship between constitutions and civil liberties. However, legislation cannot really 'transgress ' (=act in disregard of) other legislation, though an action under it could. Contravene (= be counter to) seems more appropriate.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
| 3. | something that is essential, indispensable, or basic: The cornerstone of democratic government is a free press. |
| 4. | the chief foundation on which something is constructed or developed: The cornerstone of his argument was that all peop |