Answer: harden

AnswerCrossword Clue
hardento make hard or harder; to strengthen, reinforce, toughen, or stiffen
HARDENBecome less sympathetic
hardenprotect from blast, heat, or radiation (as by a thick barrier or placement underground)
hardento reinforce the structure of something to protect it from nuclear attack
hardenure toughen harden troops
hardeninure to unfavorable environmental conditions (as cold) often used with off harden off seedlings before transplanting
hardenassume an appearance of harshness or severity her face hardened at the thought
hardenconfirm in disposition, feelings, or action
hardento make hard (firm and unyielding)
HARDENBake, perhaps
hardento make unfeeling
hardenbecome firm, stable, or settled
hardento become harder, tougher, stiffer, etc.
hardento make hard or harder
hardenbecome hard or harder
harden(of a market, prices, etc.) to firm up or rise
hardenbecome gradually acclimatized to unfavorable conditions often used with off plants hardened off before the first frost
hardenmake callous hardened his heart
HARDENSet, as cement
HARDENFreeze or gel
HARDENBearded James of the NBA
HARDENSet
HARDENMake unemotional
HARDENBecome pitiless
HARDENGel
HARDENSet, as concrete
HARDENGet tough
HARDENCalcify
HARDENMake tougher
HARDENBecome rigid
HARDEN1929 Nobel prize winner in chemistry.
HARDENSet.
HARDENSolidify
HARDENBecome callous
HARDENMake firm
HARDENFortify