hardening
noun
- a making or becoming hard
- a substance used to harden something
See hardening in American Heritage Dictionary 4
(härˈdn-ĭng)
noun- The act or process of becoming hard or harder.
- Something that hardens, as a substance added to iron to yield steel.
- Gradual exposure of plants to cold weather.
Learn more about hardening
link/cite
print
suggestion box