harden

v., -ened, -en·ing, -ens.

v.tr.

1. To make hard or harder.
2. To enable to withstand physical or mental hardship.
3. To make unfeeling, unsympathetic, or callous: “To love love and not its meaning hardens the heart in monstrous ways” (Archibald MacLeish).
4. To make sharp, as in outline.
5. To protect (nuclear weapons) by surrounding with earth or concrete.

v.intr.

1. To become hard or harder.
2. To rise and become stable. Used of prices.
3. To become inured.

SYNONYMS  harden, acclimate, acclimatize, season, toughen. These verbs mean to make resistant to hardship, especially through continued exposure: was hardened to frontier life; is acclimated to the tropical heat; was acclimatized by long hours to overwork; became seasoned to life in prison; toughened by experience.

verb

1. To make or become physically hard: cake, concrete, congeal, dry, indurate, petrify, set¹, solidify. See solid/liquid/consistency.
2. To make firmer in a particular conviction or habit: confirm, fortify, strengthen. See strong/weak.
3. To make resistant to hardship, especially through continued exposure: acclimate, acclimatize, caseharden, indurate, season, toughen. See continue/stop/pause, resist/yield.

v

Definition: accustom
Antonyms: be intolerant, indulge, soften, spoil

v

Definition: make or become solid
Antonyms: liquefy, melt, soften

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Dansk (Danish)
v. tr. - gøre hård, hærde
v. intr. - blive hård, hærdes, blive fast, størkne, stivne

Nederlands (Dutch)
verharden, ongevoelig maken, verstokt, stijgen van koers/-beurs, gewennen, gevoelens uitsluiten, bestendig maken, stollen, verkalken

Français (French)
v. tr. - (gén) (faire) durcir, (Ind) tremper, (fig) endurcir, raffermir, renforcer, durcir (une attitude), s'endurcir (à), se cristalliser en, (Fin) se raffermir, être en hausse
v. intr. - se scléroser, se calcifier, s'endurcir à

idioms:

• harden something off    endurcir (une plante)

Deutsch (German)
v. - abhärten, härten, (sich) verhärten

idioms:

• harden something off    widerstandsfähig machen (Pflanze)

Ελληνική (Greek)
v. - σκληραίνω, σκληρύνω/-ομαι, σκληραγωγώ/-ούμαι, στερεοποιούμαι, πήζω (κν. δένω)

Italiano (Italian)
temprare, indurire, indurirsi, sclerotizzarsi

Português (Portuguese)
v. - endurecer

Русский (Russian)
укреплять, закалять, делать бесчувственным, ожесточиться, повышаться (о ценах), стабилизироваться (о рынке)

Español (Spanish)
v. tr. - endurecer, templar, insensibilizar, curtir, acostumbrar, solidificar
v. intr. - endurecerse, acostumbrarse, solidificarse, calcificarse

idioms:

• harden something off    aclimatar una planta al frío exponiéndola gradualmente al mismo

Svenska (Swedish)
v. - göra hårdare, skärpa (bildl.), härda

中文（简体）(Chinese (Simplified))
使变硬, 使冷酷, 使坚强, 变硬, 涨价, 变冷酷

中文（繁體）(Chinese (Traditional))
v. tr. - 使變硬, 使冷酷, 使堅強
v. intr. - 變硬, 漲價, 變冷酷

한국어 (Korean)
v. tr. - 딱딱하게 하다, 강하게 하다, 무감각하게 하다, 용기를 가지게 하다
v. intr. - 딱딱해지다, 강해지다, 무정해지다

日本語 (Japanese)
v. - 堅くする, 固める, 頑固にする, 頑固になる, 無情にする, 無感覚にする, 強固にする, 強くする, 強くなる, 鍛える

العربيه (Arabic)
‏(فعل) يقسي, يصلد, يحجر الفؤاد, يمرس, , يعوده إحتمال المشاق, يقسو, يخشوشن, يتعود احتمال المشاق‏

עברית (Hebrew)
v. tr. - ‮הקשה, הקשיח, חישל‬
v. intr. - ‮התקשה, התחשל, התייצב (מחיר), הסתייד (עורק)‬

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