- harden⇄adj. hardenable.
- harden⇄expr. harden off, to inure (plants) to cold by gradually reducing the temperature of a hotbed or by increasing the time of exposure to wind and sunlight.
Ex. The flats should be placed in ... a protected place outside so that the seedlings will ""h - harden⇄harden, transitive verb.
1. to make hard.
Ex. Frost hardened the water of the puddles into ice.
(SYN) solidify.
2. to make capable of endurance.
(SYN) accustom.
3. (Figurative.) to make unfeeling or pitiless. - harden⇄noun hardener.
- harden⇄v.i. 1. to become hard.
Ex. When the candy cooled, it hardened.
(SYN) solidify.
2. to become capable of endurance.
Ex. When he returned from a summer at camp, he had hardened and become fit.
(SYN) accustom.
3. (Fig