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Using the suffix - proof
The suffix “proof” can be added to a word to create an adjective
which relates to the original word in one of several ways.
1. impervious to e.g. my watch is waterproof (it will still work if
it gets wet)
2. protected from or against e.g. my car is rustproof (the car is
made from material which will not rust or has been painted
with rustproof paint)
3. resistant to, unaffected by e.g. the film stuntman wore a
fireproof jacket (the jacket is made of a material which will
not catch fire)

New words can enter the English language in this way, typically
using a hyphen.
For example:
“We use firewalls and encryption to make our computers
hacker-proof.”

The words can be used as verbs in the following forms:
● I asked the dealer to rustproof my new car before I take
delivery of it.
● I have burglar-proofed my home by installing window bars
and a steel door.
● We are expecting our first baby next month and we are busy
childproofing our home (we are looking in our home for
anything which might be dangerous to a small child).

Use the list of words and add the suffix proof to complete the sentences.
Bullet - Burglar - Bomb - Child - Leak - Rabbit -
Recession - Shatter - Water - Weather - Wind

This jacket is ____________ in order to protect the wearer from wind chill.
The police will wear ____________ vests for protection in dangerous situations.

This jacket is windproof in order to protect the wearer from wind chill.
The police will wear bulletproof vests for protection in dangerous situations.

Hong Kong people like to have heavy steel doors and window bars to make their homes
____________.
If you hike in Hong Kong during the rainy season it is best to wear ____________ shoes.

Hong Kong people like to have heavy steel doors and window bars to make their homes
burglarproof.
If you hike in Hong Kong during the rainy season it is best to wear waterproof shoes.

China appears to be ____________ because of its strong economy.
Many Hong Kong buildings have ____________ windows because of the risk of debris flying during
typhoons.

China appears to be recession-proof because of its strong economy.
Many Hong Kong buildings have shatterproof windows because of the risk of debris flying during
typhoons.

Farmers will put ____________ fences around their land to keep their crops from being destroyed.

Farmers will put rabbit-proof fences around their land to keep their crops from being destroyed.

There is a ____________ bunker under the White House in case there is a war.
Parents can ____________ their homes by removing all items that may cause harm to small children.

There is a bomb-proof bunker under the White House in case there is a war.
Parents can childproof their homes by removing all items that may cause harm to small children.

The fish tank has rubber seals in order to make it ____________ .
Many building use ____________ paint in order to protect against the elements.

The fish tank has rubber seals in order to make it leakproof.
Many building use weatherproof paint in order to protect against the elements.

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Adding the Suffix Proof

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Adding the Suffix Proof