Definition

1. Verb (transitive and intransitive):
   • To make or become hard or hardened: This can refer to a physical process, such as a substance solidifying, or a figurative process, such as an attitude or feeling becoming unfeeling or fixed.
   • To make or become callous or inured: To cause someone to become accustomed to something unpleasant, often leading to emotional hardness or insensitivity.
   • To establish firmly; to cause to become fixed or ingrained: Often used for customs, habits, or beliefs that become deeply set.

Examples of Usage

• Verb (Transitive - Physical):

  • The intense heat will indurate the clay, turning it into pottery.
  • Years of exposure to the elements had indurated the surface of the stone.

• Verb (Transitive - Figurative/Emotional):

  • A lifetime of hardship had indurated his heart to the suffering of others.
  • The brutal training was designed to indurate the recruits to fatigue and fear.

• Verb (Intransitive - Physical):

  • The cement mixture will slowly indurate over the next 24 hours.
  • As the lava cooled, it began to indurate into solid rock.

• Verb (Intransitive - Figurative):

  • Over time, his prejudices indurated, making him resistant to new ideas.
  • The tradition indurated over centuries, becoming an unchangeable part of their culture.

Advanced Usage

• "Indurated" as an Adjective: The past participle is commonly used as an adjective meaning hardened, callous, or firmly established.

  • He spoke with an indurated cynicism born of disappointment.
  • The doctor examined the indurated tissue around the old wound.

• In Medical/Geological Contexts: Used technically to describe abnormally hardened tissue (medical) or rock formations (geological).

  • The biopsy revealed an area of indurated skin.
  • The cliff was composed of highly indurated sandstone.

Variants and Related Words

• Indurated (adj): Hardened; callous; established.
• Induration (n): The process of hardening; the state of being hardened. Often used in medical contexts (e.g., ).
• Indurative (adj): Having the quality of hardening.

Synonyms

• Harden (most common general synonym)
• Inure (specifically for becoming accustomed to something difficult)
• Toughen
• Solidify (more for physical processes)
• Callous (specifically for emotional hardening)
• Anneal (technical, for metals/glass)

Antonyms

• Soften
• Melt
• Sensitize
• Disintegrate
• Weaken

Notes on Usage

• Formality: "Indurate" is a formal, somewhat literary, and technical word. In everyday language, "harden" or "toughen" are more common.
• Connotation: When used figuratively for people or attitudes, it often carries a negative connotation, implying a loss of sensitivity, compassion, or flexibility.
• Grammar: It can be used both transitively (with an object: ) and intransitively (without an object: ).

Adjective

1. emotionally hardened
   • a callous indifference to suffering
   • cold-blooded and indurate to public opinion

Verb

1. cause to accept or become hardened to; habituate
   • He was inured to the cold
2. become hard or harder
   • The wax hardened
3. make hard or harder
   • The cold hardened the butter
4. become fixed or established
   • indurated customs