Opposition to the goverment has 'hardened' as news of further scandals has leaked out.
The presence of certain substances in the blood can cause the arteries to 'harden'.
It will take several hours for the concrete to 'harden' (into a solid block).
(..) Get the Chief! - Yeah. I had the rest of the staff cover in their quarters. Okay, Bob, Bob, listen to me. I want % accountability. All right? We're gonna harden our defenses here in C. This is gonna be our fallback. Hey, lock this building down! You, you, let's go. Let's go. Do it. How can I help? (..)2016 13 Hours