Translation guide
The process or state of making something resistant to water. In Japanese, this is expressed through nouns, verbs, and compound terms depending on whether you are talking about treating a material, describing a product feature, or referring to the waterproof quality itself.
Referring to the action of applying a treatment or process to make an object or material resistant to water.
The most common and general term for waterproofing as a process or treatment. Literally 'waterproof processing'. Used for fabrics, electronics, construction, etc.
This jacket has been treated with waterproofing.
Similar to 防水加工, but often used in more technical or industrial contexts. 'Waterproof treatment'.
Apply waterproofing treatment to the concrete.
Specifically refers to waterproofing work in construction, such as for roofs, basements, or bathrooms. 'Waterproofing construction/works'.
We will carry out waterproofing work on the rooftop.
Describing the state of being waterproof, often as a feature of a product.
The basic noun meaning 'waterproof' or 'waterproofing'. Often used in compound words or as a label on products.
This watch is waterproof.
Specifically refers to 'waterproofness' or 'water resistance' as a property. Often used in technical specifications.
Referring to the substance or layer applied to make something waterproof.
防水 (bōsui) means completely waterproof, while 耐水 (taisui) means water-resistant. For everyday items like watches or phones, 防水 is the standard term, but technical specifications may distinguish between the two. 耐水 is less common in consumer products.
防水 can be attached to many nouns to indicate waterproof versions: 防水カメラ (waterproof camera), 防水バッグ (waterproof bag), 防水スプレー (waterproof spray). This is a productive pattern.
This material has high waterproofing properties.
Spray waterproofing agent for fabric.
Waterproof sheet or membrane, used in construction or as a protective cover.
Lay down a waterproofing sheet.