Object

• Pharaoh: At an earlier stage in the story we were told that Pharaoh hardened his heart.

• artery: Arguments, anxiety, tension and repressed emotions all raise adrenaline levels which raises blood pressure by contracting and hardening the arteries over time.

• blade: Powerful machine with 530mm long precision ground fully hardened dual action blades for cutting up to a maximum of 14mm diameter.

• steel: Knives are made as a single piece of forged stainless steel especially hardened to maintain a cutting edge.

• induction: The gears were all hobbed from the solid, shaved, induction hardened and honed to produce the correct tooth form.

• battle: David O'Leary's babies were rapidly turning into battle hardened European warriors.

Preposition: into

• rock: Marble stone consists of wavy layers of colored sediments that harden into rock.

Modifying Another Word

• environmentally: Environmentally hardened, the Alcatel 1692 OPS modules can be placed in uncontrolled enclosures.

• gradually: Over time, more and more layers of sediment built up and gradually hardened into rock.

• sufficiently: When the joint has hardened sufficiently the excess flux is removed using a damp cloth.

• specially: The working surfaces of this top quality anvil have been specially hardened to protect against wear.

• rapidly: These stems are whitish when young, but rapidly harden to become green, tough, furrowed and woody.

• quickly: The surface of products placed on the film is quickly hardened to a depth of around 1mm.

Followed by an intransitive particle

• off: These little plants are being hardened off in the cold frames at the moment.

• up: I suppose it is a bit like people from Kent moving to Scotland - they have to harden up to the weather!

Followed by a transitive particle

• off: You will then need to harden off the seed trays.

Used with why or when

• when: And Dryden's suspicions harden when days later he finds the frozen body of Declan's best friend.

Infinitive complement

• form: A number of thick, muddy deposits settled on the sea floor and slowly hardened to form rock.

Particle object: off_obj

• plant: Take advantage of any fine mild weather to harden off bedding plants by placing outdoors during the day.

Preposition: of

• artery: These lead to ' hardening of the arteries ' .