1. (verb) become hard or harder

• indurate

2. (verb) make hard or harder

• indurate

3. (verb) harden by reheating and cooling in oil

• temper

4. (verb) make fit

• season

5. (verb) cause to accept or become hardened to; habituate

• indurate
• inure

1. (verb) become hard or harder

• change

2. (verb) make hard or harder

• change

3. (verb) harden by reheating and cooling in oil

• modify

4. (verb) make fit

• toughen

5. (verb) cause to accept or become hardened to; habituate

• accustom
• habituate

1. (verb) become hard or harder

• calcify
• callus
• cure
• encrust
• incrust

2. (verb) make hard or harder

• anneal
• normalize
• temper
• callus
• face-harden

3. (verb) cause to accept or become hardened to; habituate

• brace oneself for
• prepare for
• steel oneself against
• steel onself for
• callous
• cauterise
• cauterize

1. (verb) become hard or harder

• curing
• hardening
• set
• solidification
• solidifying
• induration
• sclerosis

2. (verb) make hard or harder

• hardening
• induration
• sclerosis

3. (verb) harden by reheating and cooling in oil

• annealing
• tempering
• temper
• toughness
• temperance

1. (verb) become hard or harder

• soften

2. (verb) make hard or harder

• soften