HARDENS
- HARDEN, to make hard [v]
- (of a market, prices, etc.) to firm up or rise
- to make hard or harder; to strengthen, reinforce, toughen, or stiffen
- to make unfeeling
- to reinforce the structure of something to protect it from nuclear attack
- to become harder, tougher, stiffer, etc.
- HARDEN, to make hard (firm and unyielding) [v]