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If rock or soil is friable, it breaks apart easily into very small pieces or into powder. You can it with your fingers, or a little weather and walking will do the same. like some soils to be a bit friable, because roots and water can move through them; builders and walkers may not, because the ground will not hold. Scientists, doctors, and soil people use the word more than ordinary speakers. In everyday talk, most people would just say or easy to break. Though actually, sounds and a little food-like; friable stays technical, and it does not mean the thing is already dust — only that it will become dust without much force.
易碎的；易粉碎的（指土、岩石等）
組成Borrowed from French friable, from Latin friabilis (able to be crumbled), from friō (to crumble).
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
friableadj/ˈfɹaɪəbl̩/
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Easily broken into small fragments, crumbled, or reduced to powder.
- Spiders had woven their vague trapezes between the friable heads of dead peonies in enormous glass jars streaked with tide marks where the water had evaporated long ago.
- This light, friable type of material offered excellent insulation against both desert heat and also the cold of darkness during the winter.
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geographygeologynatural-sciencesOf soil, loose and large-grained in consistency.
- Sand has been incorporated to make the soil more friable.
- So while two men under his directions were digging the grave with sticks in the friable granitic soil, he superintended the costume of the other actors in the drama.
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medicinesciencestoxicologyOf a poison, likely to crumble and become airborne, thus becoming a health risk.
- It is when asbestos-containing products are friable that hazardous asbestos fibers are likely to be released and sent airborne.
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mathematicssciencesOf a number: smooth, that factors completely into small prime numbers.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。