This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Impervious to or unaffected by water.

adj. Made of or coated or treated with rubber, plastic, or a sealing agent to prevent penetration by water.

n. A material or fabric that is impervious to water.

n. Chiefly British A raincoat or other such outer garment.

v. To make impervious to water.

adj. Unaffected by water.

adj. Made of or covered with material that doesn't allow water in.

v. To make waterproof or water-resistant.

adj. Proof against penetration or permeation by water; impervious to water.

n. A substance or preparation for rendering cloth, leather, etc., impervious to water.

n. Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; esp., an outer garment made of such material.

v. To render impervious to water, as cloth, leather, etc.

Impervious to water, or nearly so

n. Any material which repels water; especially, a light woolen cloth made for the purpose, and subjected to some waterproofing application.

n. A garment of some material that repels water, made either of waterproof , or of mackintosh or a similar material made with india-rubber.

To render impervious to water, as cloth, leather, etc.

n. a water-resistant coat

adj. not permitting the passage of water

n. any fabric impervious to water

v. make watertight

"Â This was also in waterproof ink, but using a finer point pen."

tight   

waterproofed    waterproofing    waterproofness    waterproofs   

cloth    fabric    material    textile    seal off    seal   

waterproof glue   

oilskin    nylon    water-tight    woolen    sheepskin    leathern    fur-lined    sealskin    protective    quilted